I think it's fair to say that older people with above average income or wealth are the group that would be most able to pay more tax without any great difficulty, but quite what form that tax should take I'm not sure.
I was amazed for years that Tories would go on and on about inheritance tax, even the ones that weren't wealthy enough to pay it, but seemed to completely ignore the risk that they would lose the value if their house, however modest, if they went into care. I can only think the very wealthiest Tories were the ones to push that line, and the others were just plain gullible and swallowed it.