Texas Judge Jean Boyd gave no jail time to Ethan Couch, only probation, because, although his drunk-and-drugged driving killed four people and injured others, he suffers from "Affluenza," the inability (due to his wealthy upbringing) to tell right from wrong, to realize that his actions have consequences.
That's not a disease, it is Criminal Insanity. If that is the case, he ought to be in a hospital for the dangerously criminally insane, (and, by the way, his parents should be charged with child neglect.)
Of course, I do not believe he is really insane, that's just his lame-@$$ lawyer's excuse for his real problem, the boy is evil. He doesn't care about consequences, as long as the consequences do not hurt him. His parents are likely evil, too; they taught him to be that way.
The Golden Rule: Whoever has the Gold, makes the Rules. Now it's in the legal system as a precedent. Rich people simply don't know better, therefore they can't be blamed.