For fans of the Simpsons, here are some fun quotes relating to incentives.
Homer Simpson demonstrating the need for adequate incentives when effort is unobservable:
If you don't like your job, you don't strike. You just go in every day and do it really half-assed. That's the American way.
Edna Krabappel on student incentives:
Now I don't want you to worry, class. These tests will have no effect on your grade. They merely determine your future social status and financial success.
Montgomery Burns on negative salaries: