Of course there's something financial going on. Resources are limited and they should be utilized where they will do the most benefit.
I don't mean to be a prick cause I know it sucks when your parents die, but you didn't say how old your mother was, why she needed to make 'comeback after comeback', or what the comebacks consisted of; all things which should be considered when evaluating end of life care.
It it may not have been relevant to your situation, but we need to do a whole lot less of keeping people alive just for the sake of breathing in this country.