>I'll repeat what I always say though: poor people aren't fat because they're poor, they're fat for the same reason they're poor -- they're not too bright, have poor impulse control, don't plan ahead, and so forth.

Evidence? Not saying it's necessarily false, but I can't help but notice that healthy food is much, much more expensive than food that's bad for you. Calorie-wise, eating food packed with high fructose corn syrup is probably one of the cheapest ways to eat. You end up spending way more (I know because I do) buying vegetables, lean meats, dairy, etc.