I'm retiring today, after working almost constantly for 53 years. I carried on working, albeit part-time, for 4 years beyond pension age because I needed to build up a buffer of savings so that I can afford to fix things in the house as needed and not panic if the washing machine or something needs replacing. I have a small private pension and full SRP.
My council tax payment and energy bill come to more than a quarter of my state pension. When you add in tv licence, water, internet etc there wouldn't be much left if I was on SRP only. And I live in a small town in a rural county with shite public transport so free bus travel is of very limited use and I need a car for most non-local journeys (public transport to the nearest hospital involves 3 buses or two buses and a train, and unless a hospital appointment is after about 11 am, I can't use my bus pass anyway as I'd have to leave before the 9.30 start time).
MIL gets pension credit which is only £3 a week less than full SRP, winter fuel allowance (£300) full housing benefit and 100% reduction in her council tax. If anything goes wrong in her house, she just rings the council and they come and fix it. She has considerably more disposable income than I do, despite working less than 10 years in her entire life. And if she needs to go into a care home, the state will pay; if I do, they'll sell my house to cover the costs.
I don't begrudge her the money, but it seems unfair that she gets more in pension credit + winter fuel allowance than I get in pension after working all my adult life.