That is why my work is interesting. I'm going against the grain and arguing why reward-based systems are problematic.

If you watch the entire hour of this talk, you'll learn why: http://www.youtube.com/watch?v=Rux2E6gExFQ

Or, if you don't have an hour, here's a 15-minute version (with a paper):
http://becauseplaymatters.com/blog/2012/6/13/a-user-centered...

Or, if you don't have 15 minutes, here's a 9-minute version:
http://www.youtube.com/watch?v=jqFEJ6fdBqI&feature=plcp

Or, if you don't have 9 minutes, here's the short of it:
Rewards used to control behavior replace internal motivation with reward-based motivation. If you take away the rewards, the person then has less internal motivation than when you started with the reward system.

Want more?
Read Drive by Daniel Pink or Punished by Rewards by Alfie Kohn.