if they have no money and no relatives they get thrown into the pit!.
if they have family they usually get taken care of. you move the old relative to your house and rent out his own house if he has one to help with the expenses. sometimes someones moves in with them if they dont want to leave their home.
I went to school with many Anglos, who spoke only English at home and were not really integrated. Some of them were 5th. generation immigrants, but were proud to be 100% British.