Don't eat the rich. Humans contain a lot of toxins that are harmful to humans, and eating them doubles up on that. Also they contain (obviously enough) human vector diseases that you can catch in a way eating another species you wouldn't necessarily; Compost the rich and use them to grow other crops instead.
@DamienGranz I want to know what the threshold for rich is. And once you're over that threshold, if you give a certain percentage to charity or the arts, are you exempt from being eaten?