The state pension triple lock could be killed in Parliament as Labour MPs are understood to be increasingly in favour of scrapping "unaffordable long term" payment rate hikes.
Reports suggest a growing number of MPs are privately pushing to abolish the triple lock pension guarantee, with discussions intensifying about how to phase out the policy while minimising electoral fallout.
Thanks to the triple lock, state pension payment rates are hiked every year in line with either the rate of inflation, average wage growth, or 2.5 per cent; whichever is the highest that year.
However, the Office for Budget Responsibility (OBR) has warned that the payment uprate mechanism is costing the taxpayer £10billion than initially forecast.
State pension future in doubt as Labour MPs plot axing 'unaffordable' triple lock
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Former Cabinet minister Liam Byrne has emerged as the most senior serving Labour MP to openly advocate for scrapping the system, arguing in an essay for the centre-right think-tank Bright Blue for "a gradual move from the triple lock's ratchet effect toward a more stable uprating mechanism."
At least 20 backbenchers have privately expressed support for reform, according to Labour MP Graeme Downie, who has been vocal about the need for change.
The covert campaign comes despite Labour's manifesto commitment to preserve the triple lock throughout this Parliament, The i Paper reports.
Elevated inflation in recent years has driven the annual cost to approximately £146billion, representing five per cent of GDP and exceeding twice the nation's defence budget.
How the state pension triple lock has changed over the years | GB NEWS / FIDELITY INTERNATIONAL LATEST DEVELOPMENTS
What has the impact of the state pension triple lock been on the public's finances | OBR Looking ahead, the OBR projects the triple lock will add around 1.6 per cent of GDP to pension expenditure over the coming half-century, accounting for roughly half of the total expected increase in pension spending.
Mr Downie , the MP for Dunfermline and Dollar, maintains that elderly citizens should "continue to be supported" but insists Labour must be "unashamed about saying we are about the next generation".
He told The i Paper: "The triple lock costs tens of billions of pounds more than it was expected to cost, yet we still have pensioners living in poverty, which tells you that the current system isn't working, and it's costing too much money."
The backbencher has called for redirecting savings toward defence spending and support for younger people, declaring that "nothing should be off the table" for achieving the necessary generational shift.
How much will the state pension triple lock cost the British taxpayer? | OBR Former prime minister Tony Blair has warned the triple lock's generosity is "not affordable" over the long term, while former Conservative chancellor Jeremy Hunt told the BBC the policy is "not just unaffordable but actually immoral" because it burdens younger generations with debt.
Former Labour deputy leader Harriet Harman proposed in April that means-testing the triple lock could free up funds for defence.
The Labour Growth Group, a centrist faction formed after the party's landslide victory, argues the policy "sits in a fiscal space" better deployed supporting working-age people.
Mark McVitie, the group's outgoing director, said MPs focused on intergenerational fairness believe "people working now are getting clobbered on energy, on rent, on everything".