Steven D. Levitt said this quote

It might be worthwhile to take a familiar question—why is there so much crime in modern society?—and stand it on its head: why isn't there a bit more crime?After all, every one of us regularly passes up opportunities to main, steal, and defraud. The chance of going to jail—thereby losing your job, your house, and your freedom, all of which are essentially economic penalties—is certainly a strong incentive. But when it comes to crime people also respond to moral incentives (they don't want to do something they consider wrong) and social incentives (they don't want to be seen by others as doing something wrong).