There's also a Miami Vice episode (with Al Bundy's actor (Ed O'Neill)) that deals with this stuff, and it also ends tragically, though has a different sort of twist.
An undercover cop that gets used to the glittery 'easy life' wouldn't really want to go back to the crappy apartment/suburbian hellhole with a naggy bulldogmonster for a wife and driving a beat-up car, having to pay mortgages and watching TV as the only entertainment after a hard, life-endangering day at work.
Ed O'Neill pulls off a really believable performance in that episode, so good, in fact, that you ACTUALLY forget for a few seconds that it's Al Bundy. Now, that's impressive!
I think in this movie, the protagonist's saving grace (besides his young age and naivety), is his large, loving family. He had a lot to lose by giving himself to the dark side.