I think there's a deep-seated notion (and lard-arsed way of thinking) that good must always be rewarded, and badness always punished - the 'by their fruits shall ye know them' kind of idea. The trouble with this is, people who are blessed with the 'rewards' believe they've somehow earned them. (Of course, some have, but lots haven't). It's not enough to be fortunate; they want to be righteous on top. (Although I wonder if the aggression directed towards the less fortunate might indicate there's a touch of cognitive dissonance going on).

As an endomorph who married into a family of ectomorphs, I know whereof I speak. They eat sugar and fat, consume three meals daily and snack. They don't do much in the way of exercise, and yet they're all thin - scrawny even. This, of course, entitles them to comment on the diets of rounder folk - even when they don't have a clue what those diets consist of.