Executive Summary

The United Kingdom's public debt stands at approximately £2.8 trillion — 93.2% of GDP. Debt interest payments reached £106 billion in 2024-25, equivalent to the entire education budget, and are projected to rise further.¹ Without structural reform, the OBR projects debt reaching 275-325% of GDP by the 2070s, driven by demographic pressures that are already baked in.²

This pillar makes five arguments. First, that the UK's debt problem is structurally different from and worse than its headline G7 ranking suggests — because of the rate of accumulation, the unusually high proportion of inflation-linked debt, the cost of borrowing, and a structural current-account deficit that means the UK borrows even for day-to-day spending. Second, that the answer is not austerity — the record of 2010-2019 shows that cutting public services to hit debt targets creates its own long-run fiscal costs. Third, that economic growth is the most powerful debt reducer available and must be pursued alongside fiscal consolidation. Fourth, that a Sovereign Wealth Mechanism — seeded by real revenues from depleting assets, not by borrowing — is the structural change that would have prevented the current position and must now be built. Fifth, that a Corporate Infrastructure Compact, connecting business contribution to infrastructure investment, addresses the structural market failure that has left UK public infrastructure chronically underinvested.

This pillar does not propose a target debt-to-GDP ratio by a specific date. Arbitrary numerical targets have been set and broken eight times since 2011. What matters is the structural changes that determine whether debt rises or falls over a generation.

Key Proposals

1. The Honest Diagnosis

The UK's fiscal position sits in mid-table among G7 economies by headline debt-to-GDP.³ That comparison is misleading. Three structural features make the UK's position significantly worse than the ranking suggests.

First, the rate of accumulation. Between 2019 and 2024, UK gross debt rose by 17.9 percentage points — against an average of just 0.7 percentage points across advanced economies. The UK added debt faster than almost anyone else during that period. Second, inflation-linked exposure. Approximately 25% of UK gilts are index-linked — the highest share of any major economy by a significant margin.⁴ When inflation spiked in 2022-23, UK interest costs surged in ways that French, German, and US debt did not. This is a structural vulnerability that no other G7 economy replicates at this scale. Third, the structural current-account deficit. The UK borrows even for day-to-day spending, not just investment. Most comparable economies, whatever their total debt level, are closer to current balance on day-to-day spending.

2. The Norway Comparison — The Road Not Taken

Norway discovered North Sea oil at approximately the same time as the United Kingdom. The UK extracted broadly comparable revenues over roughly the same period. Norway built the Government Pension Fund Global — now worth over £1 trillion⁵ — by investing a defined proportion of oil revenues rather than spending them. The fund generates returns that fund Norwegian public spending. Norway has no structural current-account deficit. Its debt interest bill is negligible relative to GDP.

The UK spent its North Sea revenues.⁶ It ran current-account deficits throughout the period of peak extraction. It accumulated debt. It now pays £106 billion a year in interest — equivalent to what Norway's fund generates in investment returns. The contrast is not incidental. It is the central story of UK fiscal policy over the past forty years, and the primary reason this pillar proposes a Sovereign Wealth Mechanism as its central structural reform.

| HONEST TRADE-OFF | The Norwegian comparison is powerful but requires honest qualification. Norway's fund benefited from exceptional returns during a period of strong global equity markets. The UK's North Sea revenues, while significant, were partly consumed by the structural consequences of deindustrialisation that preceded the oil era. And the UK's democratic politics, operating on five-year cycles, made long-term revenue reservation politically harder than in a smaller, more consensus-oriented society. These qualifications are real. They do not change the fundamental lesson: we spent what Norway saved, and the interest bill is the arithmetic consequence. |

3. The Steel Man for Current Policy

'Debt-financed investment is not the same as debt-financed consumption'

This argument is sound and the Generational Reset accepts it. A government that borrows to build infrastructure, fund education, or invest in the energy transition may generate future economic returns that more than offset the interest cost. The current government's fiscal framework, which distinguishes the current budget from capital investment, is a more defensible position than blanket debt reduction. The Generational Reset's Reform 1 embeds this distinction in primary legislation rather than convention.

'Nominal debt comparisons obscure what matters: debt sustainability'

Correct as far as it goes. The UK has one of the deepest and most liquid sovereign bond markets in the world. Gilt maturities are among the longest of any major economy. These are genuine structural advantages. But they do not change the structural exposure to index-linked debt, the rate of accumulation, or the OBR's long-run projection. The sustainability argument justifies gradualism. It does not justify inaction.

'Austerity has a record too'

The period 2010-2019 offers a live experiment. The UK achieved modest reductions in the deficit-to-GDP ratio at significant cost: real wage stagnation, public service deterioration, regional divergence, and arguably the political conditions that produced Brexit. The OBR itself has noted that repeated fiscal tightening was repeatedly undone by shocks. The lesson is not that debt doesn't matter. It is that the method of reduction matters as much as the target. This is why this pillar does not propose austerity.

4. Rejected Instruments — And Why

4.1 Debt Monetisation

Modern Monetary Theory correctly identifies that a sovereign currency issuer cannot become insolvent in its own currency. The binding constraint is not an accounting identity but productive capacity: creating money generates excess demand and prices rise. In the UK's specific circumstances — an open economy heavily dependent on imported goods and energy, with inflation expectations still sensitive after the 2022-23 experience — monetisation would trigger currency depreciation and imported inflation in ways that would fall hardest on those with the least financial resilience. The theoretical coherence of MMT does not translate into a safe operational choice for the UK.

4.2 Financial Repression

Deliberately engineering below-market interest rates or above-target inflation to erode the real value of debt has a long historical record. It transfers wealth from savers to the state. It is rejected here not as a concept but as a deliberate policy mechanism. The reforms in this pillar aim to create the conditions for r less than g organically through growth, without requiring the Bank of England's independence to be compromised or savers to be taxed through inflation without parliamentary authority.

4.3 First-Loss Guarantees and PFI-Style Mechanisms

The Private Finance Initiative transferred £60 billion in contingent liabilities to the public balance sheet for assets whose capital value has long since depreciated.⁷ Any Sovereign Wealth Mechanism capitalisation that involves government underwriting private returns is PFI by another name. The Generational Reset explicitly prohibits first-loss guarantees and return guarantees as SWM funding mechanisms. The PFI lesson must be explicit, not implied.

5. The Proposed Reforms

Reform 1: Separate Capital Investment from Current Spending in Law

The current government's fiscal charter distinguishes the current budget from capital spending, but this distinction has been applied inconsistently. The Generational Reset proposes embedding this distinction in primary legislation, with the OBR required to certify that any borrowing classified as capital investment meets published criteria for expected economic return. This prevents the 'investment' label being used to exempt politically convenient current spending from fiscal discipline while ensuring that genuine long-term investment is not constrained by current-account rules.

Reform 2: A Generational Debt Transparency Statement

Every Budget and Autumn Statement to include a plain-English Generational Debt Statement setting out: the current debt stock, interest cost, and trajectory; the projected debt per working-age person over 10, 25, and 50 years under current policy; the share of current spending being borrowed and passed to future taxpayers; and the OBR's long-run demographic projection and its implications. This is a transparency obligation, not a borrowing constraint. The public cannot hold governments accountable for fiscal decisions they cannot see.

Reform 3: Reduce Index-Linked Gilt Exposure

The UK's reliance on index-linked gilts — approximately 25% of the stock — is a structural vulnerability no other major economy replicates. The Generational Reset proposes that the Debt Management Office set an explicit, published target to reduce index-linked gilt issuance as a share of new issuance over 15 years — moving toward a mix closer to European peers at typically 5-10% index-linked. This is a flow policy, not a forced redemption of existing stock. The 15-year horizon is deliberate: gradual transition minimises market disruption and gives pension funds time to adjust their hedging strategies.

Reform 4: A Sovereign Wealth Mechanism

The UK currently receives revenues from North Sea licences, spectrum auctions, bank levies, and occasional windfall taxes — and spends them as general revenue in the year of receipt. The Generational Reset proposes that a defined proportion — initially 20%, rising to 50% over a decade — of revenues from time-limited or depleting assets be ring-fenced into a Sovereign Wealth Mechanism. Not a spending fund but a debt-reduction and future-investment reserve. Norway's Government Pension Fund Global, seeded by North Sea revenues, now exceeds £1 trillion. The UK equivalent does not exist because the revenues were spent rather than saved.

The SWM must be capitalised through real revenues — commodity revenues, public asset transfers, spectrum proceeds — not through borrowing. First-loss guarantees and return guarantees are explicitly prohibited as capitalisation mechanisms. The governance model follows the Norges Bank approach: independent board, published investment mandate, OBR-audited annual accounts, and a legally mandated infrastructure investment mandate that specifies the categories of public good the SWM is required to fund.

Reform 4b: The Corporate Infrastructure Compact

Companies operating in the UK externalise a significant portion of the infrastructure costs they consume. They benefit from publicly educated workers without bearing the full cost of that education. They use roads, power grids, digital infrastructure, and the NHS without internalising their contribution to demand on those systems. This is a structural market failure and one of the reasons UK public infrastructure has been chronically underinvested relative to peers.

The Generational Reset proposes a tiered Corporate Infrastructure Levy — applied to companies above £100 million annual turnover — with the rate linked to sector-specific infrastructure dependency. Energy-intensive manufacturers, large logistics operators, data centres, and financial services consume infrastructure differently and should contribute accordingly. The surplus above the current corporation tax rate flows directly into the SWM with a legally mandated infrastructure investment mandate. The return to companies is not a cash rebate — it is a more productive operating environment.

| HONEST TRADE-OFF | UK corporation tax is already at 25%, the highest in decades. Adding a levy risks being read by international capital as the UK becoming a high-tax jurisdiction without the offsetting advantages of Germany's engineering ecosystem or Ireland's EU access. The argument that the levy creates the ecosystem that justifies the rate must be made explicitly, credibly, and with a long enough timeframe that investors can see the return. A 15-year SWM investment roadmap, published and independently governed, is the mechanism for making that case. |

Reform 5: End Structural Current-Account Borrowing by 2035

The OBR projects the current budget moving into surplus by 2030-31 under current plans — but this has been projected and missed repeatedly. The Generational Reset proposes that structural current-account balance become a legally binding target enforced through automatic stabiliser mechanisms: if the OBR certifies that structural borrowing on the current account will exceed 1% of GDP for three consecutive years, a mandatory parliamentary review is triggered — requiring an explicit vote on any deviation. This is not austerity by default. It is accountability by design. Escape clauses for certified national emergencies must be defined in legislation rather than at ministerial discretion to prevent abuse.

6. What This Is Not

This pillar does not propose austerity. Cuts to public services to hit an arbitrary debt number is not the reform proposed here. The track record of 2010-2019 shows that austerity without structural reform creates its own long-term fiscal costs through underinvestment, lower productivity, and reduced economic participation. The Generational Reset targets structural causes: the index-linking problem, the absence of a sovereign wealth mechanism, the conflation of investment and consumption, the political invisibility of intergenerational debt transfer, and the failure of corporations to contribute to the infrastructure their businesses depend upon.

8. Proposals for Change

The following represent the evidence-based proposals of this pillar, put forward for public discussion and challenge.

• Embed the capital investment versus current spending distinction in primary legislation, with OBR certification of economic return criteria for all borrowing classified as capital investment.

• Require a plain-English Generational Debt Statement at every Budget and Autumn Statement, setting out debt trajectory over 10, 25, and 50 years, with OBR-mandated confidence intervals. Require elected officials to acknowledge the intergenerational implications.

• Set an explicit, published Debt Management Office target to reduce index-linked gilt issuance as a share of new issuance over 15 years, moving toward European peer levels of 5-10%.

• Establish a Sovereign Wealth Mechanism seeded by a defined proportion of revenues from depleting and time-limited assets — initially 20% rising to 50% over a decade. Governed independently on the Norges Bank model. First-loss guarantees and return guarantees explicitly prohibited as capitalisation mechanisms.

• Introduce a tiered Corporate Infrastructure Levy on companies above £100 million annual turnover, ring-fenced to the SWM with a legally mandated infrastructure investment mandate covering skills, health infrastructure, energy grid, and digital connectivity.

• Make structural current-account balance a legally binding target by 2035, with automatic parliamentary review triggered if the OBR certifies structural borrowing exceeding 1% of GDP for three consecutive years. Escape clauses for certified national emergencies defined in legislation, not at ministerial discretion.

• Publish an explicit prohibition on PFI-style mechanisms — first-loss guarantees and return guarantees — as instruments of public investment, with OBR required to flag any proposed mechanism that replicates PFI economics under a different name.

The UK's debt position is the accumulated arithmetic of a series of individually defensible decisions, none of which was made with a view to what the fiscal position would look like forty years later. Norway made different choices with comparable resources and built a £1 trillion sovereign wealth fund. The UK paid £106 billion in interest last year. The lesson is not complicated. The reform is.

The Generational Reset is a non-partisan, public-interest project. It is not affiliated with any political party, does not accept corporate funding, and publishes all its work under open licence for public discussion and adaptation.

All figures sourced from ONS, OBR, and IMF (2025-26 fiscal year and March 2026 Economic and Fiscal Outlook unless otherwise stated) | For public discussion. Not affiliated with any political party. | generationalreset.org

The Generational Reset | S1_07: Public Debt | For public discussion. Not affiliated with any political party. | generationalreset.org