This goes back to the original founding of the State Pension, whether it would be funded or unfunded. The choice was made that it would be unfunded, current pensioners would be paid out of tax receipts and they would start paying out in full immediately.I haven't kept up with a lot of the thread but it has got me wondering how we can possibly reduce the cost of the welfare state and pensions which are a huge cost of government spending.
What if we implemented a Singapore-style Central Provident Fund where social savings are compulsory, only in this case you aren't bound to the state and can switch to private savings if you wish.
Unpopular as it may be, this might also have to come with getting rid of the triple-lock. It's quite simply unsustainable and there's no reason why it has to be pegged to the highest possible payment.
The only reason it's been kept is because pensioners are an active voting bloc and will punish the party that dares to make such a decision, evidenced by Starmer's original winter fuel policy.
Other countries chose to go the funded route where pension contributions go into a investment pot and pensioners are paid out from the returns on that investment.
You could change to an Australian-style system where private pensions are encouraged and you only get state support if that's inadequate. But that would be a long-term project. Many (most?) people would not be in a position where they could accumulate the necessary pot to replace the state pension before they retired. So government is still stuck with the obligation to pay out the current state pension to those who are relying on it.