Honestly, I found it to be kind of a boring movie. The wife I found quite annoying for some reason. Very bad actress. The plot was pretty predictable and they gave very little background as to what the fuck was going on.
Life, on the whole, didn't seem so bad. No one was starving. The baby had a little plastic ball, everyone's clothes seemed relatively new & clean (except the motorcycle crew anyway). Of course there seemed to be almost no people in this brave new world but maybe that was due to their isolated rural location.
The girl with her boyfriend in the colorful car was mad cute, her brief appearance was the highlight of the film (I'd be angry as hell at those motorcycle guys too though it looks like her man got the worst of it

). I wouldn't mind seeing her in a different kind of picture (though she's probably pushing fifty now

).
Anyway, what was so great about this movie that it's such a cult classic?