Apart from 2 years when I was at uni, I've worked and paid tax since 1972, and paid NI for all that time until it stopped when I reached state pension age. I paid extra for much of that time, because I wasn't in a pension scheme so was contracted in to SERPS. That gets me an extra £2 or £3 a week. I'm still working. I pay tax on all my earnings, as my state pension uses up almost all my personal allowance, and my small public sector pension uses up the rest.
For much of my working life, private pensions weren't really a thing for anyone but the rich, and only big employers had their own schemes. And I couldn't afford to pay into a pension and pay a mortgage when interest rates were skyhigh.
As a WASPI woman, I've already been robbed of 6 years of pension income, probably around £60k, now you want to cut the paltry amount I get.
But don't worry, I won't cost much in care costs because they'll sell my house to cover those when I'm no longer able to care for myself.