The criminal justice system, from the cop in his patrol car to the US department of Justice, millions of noncriminals make a good living off criminality. When a prison is to be built, at a cost of billions of dollars, the politicians awarding the contracts often get large rake-offs. Those supplying food, clothing, etc., to the prisoners, pay their bills because of those who prey on society. The guards and the wardens live well because society pays well to keep society's predators alive.