Life isn't fair. Sometimes it seems like it's the mean and selfish people who prosper.
Good guys finish last.
This seems particularly noticeable when it comes to children. It always outrages me to see parents coddling and bribing nasty, whiny brats. Especially when there are other children being good and getting no attention whatsoever. The squeaky wheel gets the grease. Ray's mother comes in and sees what's going on and gives the little monster a piece of candy, which does absolutely nothing to change her behavior.