" What rewards and punishments do is induce compliance, and this they do very well indeed. If your objective is to get people to obey an order, to show up on time and do what they’re told, then bribing or threatening them may be sensible strategies. But if your objective is to get long-term quality in the workplace, to help students become careful thinkers and self-directed learners, or to support children in developing good values, then rewards, like punishments, are absolutely useless. In fact, as we are beginning to see, they are worse than useless—they are actually counterproductive. "

― Alfie Kohn , Punished by Rewards: The Trouble with Gold Stars, Incentive Plans, A's, Praise and Other Bribes