I think your understadning of how long term taxation, funding NHS and social care is flawed.
No retiree pays for their NHS needs. We all pay for someone elses!
And nobody pays for the whole of their social care. Again, we pay it forward, for someone else. And nowadays those who have assets pay for a proportion of those costs. Even down to selling homes for permanent social care costs.
And if you think it would be cost effective for somone to sell their home for temporary care costs then again, you have misunderstood the financial ramifications of that person then requiring state help with rent etc. The cost : benefit analysis will change over time. But I am betting that someone with far more knowledge than you or I, or the weird age hating bots that seem to crop up daily, is constatnly evaluating those costs.
(the wealthiest in the UK now)
Well, if you want to cherry pick your data...
Between April 2018 and March 2020, median individual wealth was £157,000 higher in the South East than the North East of England and this regional disparity has increased over time.
On average individual wealth increases with age, peaking in the 60-to-64 age group at a level nine times as high as the 30-to-34 age group, before falling in older age groups as people use their wealth to support life in retirement.
And of course, the individual differences
The age differences make sense. You work for a lifetime, saving what you can and, just before retirement age, many will have paid off house and cars, kids, all large standing debts etc. Will be living as cheaply as they ever have.
I suspect you are one of thise who feels it would be 'fair' if someone at the age of 20, with no experience, no saleable skills, no idea yet, gets paid the same as someone with skills honed over 40 years of working, is a provable asset to their employer,.
Some of the things you decree 'absurd and unfair' are life.
Mums and kids being poor is not because people 40 years older exist.
You perspective is coloured by what, fear or hatred?