I don't get to live by my family. I had to move for my job. I had to make new friends and travel to see old ones. When this job ends I'll probably have to move again. When I retire (God willing) and if I'm still in SF, I'll probably need to move to somewhere cheaper. I don't see why the same rules shouldn't apply to them.

If their friends and families care so much they should take them in, not put them on the public dole. As retirees they are probably better off living somewhere cheaper anyway, like a retirement community in an exurb, where everything, food, medical, and entertainment was a lot cheaper.