My situation is similar, at least as far as money.
I can’t just up and leave the wife, because there isn’t a lot she can do, and definitely wouldn’t qualify for disability.
So I’d feel assholish if I just left.
EDITING: She does take good care of me, so as to not paint a grossly negative picture of her. I just get bewildered how someone can be married to ALL THIS (cue waving my hands up and down my body) and not wait it more often.