You’re not understanding why the voting bloc was significant. It means that regardless of political party, there were lots of things that boomers en masse didn’t like and so were never touched in public policy regardless of party.
Some examples: serious reports have been warning about housing asset overvaluation and the care and pensions time bombs since the early 2000s, including the need to collapse the housing bubble, to not overburden younger generations with student debt, and to address the fact that silent generation and boomers did not want to pay for their care or pay more tax to fund it - these issues have all been repeatedly kicked into the long grass because time and again they did not play well with the older voting blocs who outnumbered the young.
It’s a fiscal fact that the the boomer generation has and will taken out more from the welfare state en masse than they put in - estimated at around 20% more than they contributed - and that there is not enough demographic numbers coming up to provide the tax funding going forward. But instead of trying to adjust this dynamic, both Labour and the Tories/Coalition took the route of kicking the can down the road for future governments to deal with. Immigration to increase the working-age population was one proposed solution; but both parties attempted to use vehicles like quantitative easing and help to buy in order to protect the value of the older generations’ assets by stealth inflation of the money supply. This automatically passed the economic buck to younger workers as it preserved inflated property values at the expense of future demographics.
At the same time, both parties ignored recommendations made repeatedly (eg by the Adair Turner report and others) that pensions would need to be reduced, triple lock removed, housing assets taxed and silent gen and boomers would need to use their assets to pay for care and healthcare instead of expecting to get it from the state. But no party would touch this reality, because it was electoral suicide with the over-50s for decades.
So here we end up, with a bulge of older population disproportionately hoarding economic resources, housing and financial assets, whilst expecting smaller numbers of following generations to pay for these AND to pay the higher taxes needed to sustain their need for the NHS/social care. It isn’t sustainable. No party has been willing to grapple with it and the problem has been known about for decades.
(You are aware of course that pensions - state or private - are not saved up but are paid out by the current workers for the current generation of retirees?)
https://www.newsletter.co.uk/business/baby-boomers-are-major-welfare-winners-report-924960
The report this is based on:
https://www.resolutionfoundation.org/app/uploads/2018/02/Generational-welfare.pdf
But the figures are also well-confirmed elsewhere, eg by the Office for National Statistics.