Burnham's Triple Lock Toll: £15.5B in Eight Years

The warning landed three weeks before Burnham was expected to take office. Nigel Green, CEO of deVere Group, told clients that Britain's pension triple lock sits on a path the fiscal math will not support for long.

The Office for Budget Responsibility's latest long-term assessment puts specific numbers to the problem. Retaining the triple lock will cost roughly £15.5 billion more by 2030 than linking the state pension to earnings alone. State pension spending, around 5% of GDP today, could approach 9% by the 2070s under current policy.

The triple lock guarantees the state pension rises each year by whichever is highest between inflation and average earnings growth, subject to a 2.5% floor. Introduced in 2011, it lifted pension incomes and reduced pensioner poverty. It also became one of the fastest-growing commitments on the government's balance sheet.

Green argued the political promise will not survive the OBR's numbers. The assessment identifies demographic change as the primary pressure driver, with pensions and healthcare accounting for most of the increase in age-related spending.

The private side of retirement saving faces its own strains. Automatic enrolment pushed workplace pension participation higher over the past decade. The OBR flagged inadequate private saving as a growing long-term fiscal risk, particularly for households relying on minimum contribution rates. Green said the debate extends beyond politics into how households prepare for retirement incomes that may fall short of expectations.

Burnham's position on the triple lock has not been specified. The question will land on his desk alongside the OBR projections and the structural forces Green described.