My mom is turning 51 in Nov(*gasp*). On august 2nd, she has back surgery. She will be in a back brace for at least 2 months & off work for 6+ months. That qualifies her as disabled. She cannot drive until she gets rid of the brace & off pain meds. I am now chauffer, cooker, & cleaner of the house(more so than now). Do you know how glad she is I have tons of cats? She is so excited that they will be there for her. She can always use a snugglebug as she cannot do much else.
I have known many older people who have pets & want pets. Most of them don't get a pet b/c we live in a rural area & it can be difficult to get them to a vet. However, those I know of who have pets have lived through things you owldn't think they could! My grandmother always says she wants a pet(just one that won't stink or get her house dirty

), so she doesn't die of lonliness. She'll never get a pet($$$ is more than she has), but she still wishes she would.
I think it is a good idea. Consider that these people may be getting cats that would otherwise be euthanized because they are unadoptable. Our shelter runs a no adoption fee adoption for senior citizens in Jan, Fab, Mar. We have done one when we had 50% of our cats be seniors, too!