Daniel Pink, author of Drive: The Surprising Truth About What Motivates Us, lists seven problems with extrinsic, carrot-and-stick motivations: 1. They can extinguish intrinsic motivation. 2. They can diminish performance. 3. They can crush creativity. 4. They can crowd out good behavior. 5. They can encourage cheating, shortcuts, and unethical behavior. 6. They can become addictive. 7. They can foster short-term thinking.