As I'm now 40+, I really feel the government should do more to care about older people

I have already saved enough for retirement and can retire already. That's not the problem. I'm single, I don't have a family. So I'll probably move into a retirement home when I'm 60+

But if something were to happen to me and impair my cognitive faculties, how would I manage my money?

There should be some kind of a way to leave your money with the government and not banks ... So that the government can take care of you.