The future of the state pension “triple lock” appears in doubt after Angela Rayner joined Rishi Sunak in refusing to say whether the measure would stay after the next election.
William Hague, the former Tory leader, also described it as “unsustainable” and called for it to be phased out.
It came as official figures showed pensioners are set for a more than 8 per cent boost next year after record wage growth continued, at a cost of billions.
Pay including bonuses grew by 8.5 per cent in the three months to July, meaning the state pension will rise by the same amount in April thanks to the lock – which commits ministers to an increase by whichever is highest – wage growth, inflation or 2.5 per cent.
Labour’s deputy leader Ms Rayner refused to commit to keeping the triple lock in place if Labour wins the next election, saying her party would not make “unfunded” spending commitments.
Speaking to BBC Breakfast, she promised Labour “will make sure pensioners and children and everyone in the UK can get on”.
At the weekend Mr Sunak also refused to pledge that his party’s next manifesto would contain a commitment to the triple lock.
Labour said the Conservatives promised to maintain the lock at the last election and urged the government to stick to that commitment.
“As Angela said, all future spending commitments for after the election will be laid out in our manifesto when we know the state of the public finances, as is usual practice.”
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No 10 said the government “remained committed” to the triple lock, but would not be drawn on how much the state pension would rise by, saying that would be set out later this autumn.
Speaking to reporters during his trip to the G20 summit in India, Mr Sunak said: “We’re not going to speculate on the election manifesto now. I’ve got plenty to get on with between now and then.”
Tuesday’s bumper wage growth figures will also pile pressure on the Bank of England to raise interest rates yet again later this month.
The squeeze on public finances, combined with sticky inflation, has also led Mr Hunt to warn it is “unlikely” there will be spare money for tax cuts in his autumn budget.
The chancellor said bringing down inflation remained his priority, and cutting taxes risked making matters worse.
In an interview with Bloomberg TV, Mr Hunt warned: “We have to be careful not to pump extra money into the economy, into people’s pockets, as that will pump up inflation.
Asked whether tax cuts were affordable, he said: “I think it’s unlikely because since the spring budget, when the last numbers were published, we’ve seen inflation stickier than was forecast at the time and that means that interest payments are high.”
Responding to Tuesday’s wage growth figures, Mr Hunt said: “Wage growth remains high, partly reflecting one-off payments to public sector workers, but for real wages to grow sustainably we must stick to our plan to halve inflation.”
Think tank the Institute for Fiscal Studies said the basic state pension is set to rise from its current £156.20 per week to £169.50.
A full new state pension – which those who reached state pension age since April 2016 can receive – would rise from £203.85 per week to £221.20, it said.
Associate director Jonathan Cribb said: “Since its introduction in 2010, the triple lock, together with the introduction of the new state pension, has significantly increased the generosity of the state pension relative to earnings.
“But this comes at a cost to public finances.”
The triple lock has added £11bn to public spending in 2023-24 compared to increasing the rate in line with prices or just earnings, the IFS said.