Knowing When To Give Up

We have a guy at work, been with us a little over a year now. In his thirties, wife, kid. You think this guy would want to work as hard as he could to provide for his family, but his main goal is to be fired so he can collect unemployment. No aspiration to move up, make full time status, or try another department. They just cut him down to 4 or 5 hours a week, and wait on him to quit. I've tried to encourage him, get him more hours, help him find another job, anything to try and help the guy. He's stopped caring. Our last conversation ended with "I'd rather be sitting at home on the couch." Why would I care so much? I don't really know. Maybe I realize his potential, or maybe I feel for his family. The wife doesn't want to work either, as I understand it. He's a great guy. Just lazy, I guess. I hate that I can't help the guy, but Mom has always said "You can't help anyone that wont help themselves". I told my manager today that scheduling him with me isn't working. So I guess next week he'll go from 20 hours back to 5. I believe this is the reason I don't get too attached to people at work.