There aren't many pensioners whose working life was at a time when there was no welfare state. DH's parents are in their 80s. (Mine are not in the UK.) Most of their working life, they benefitted from the NHS, and from the knowledge that if they lost their job, there was a safety net. They didn't have to pay for their son's education. Public transport was cheap. They had the opportunity to pay in to pension schemes where huge bonuses were paid (in the 1980s). The value of their fairly ordinary house in the Midlands (ie, not London) has increased to 10 times what they originally paid for it.
These are ordinary working people, who have benefitted hugely from the financial circumstances prevalent during their working lives.
I know that there are poor pensioners, just as there are poor working age people, and poor children. And the safety net should be there for all these people.
I don't have particular sympathy for pensioners, as a whole, though. Many have had opportunities that the working people of today may never have.