We could consider, if we want (can afford) to take a measured, medium term and probably fairer approach dropping one of the three components of triple lock, or use a multi year average to smooth it as suggested by the new pensions minister (I think?). At the same time continue the freeze in the personal allowance, so bringing more income into tax but at the same time overhaul all of the higher rates, which have monumentally unhelpful cliff edges for both benefits and incentives to work more. So rather than jumping from 20 to 40% at £40k, have a more progressive 20/30/40/50% build. This would mean those with some of their own pension provision would pay increasingly more tax in the top slice of retirement income (let’s call it the state pension element) negating the need for a complex means testing regime.
At the same time roll employees NI into income tax to remove the direct link between ‘I’ve paid my NI’ and ‘that entitles me to a state pension no matter what’ mindset.
If at the same time the whole income tax regime can be simplified then fantastic. But, we really ought to stop taxing people for things that have increased just because of inflation. So bring back indexation on capital gains, and align rates to the new income tax rates. One could also just give everyone one one tax free allowance, to be used on income or capital gains, rather than the two at present.