So they have no bank account, no medicare or social security? Who are theses old people you speak of?
Well. many older people opened bank accounts back before you needed ID to do so.
My dad for instance opened his bank account back in the 80s and never had to show an ID until the day he died there. Social Security just required a birth certificate and that was it.
I'm not saying that it's a large group. It's certainly not, but those people do exist. That's all.