At the 2009 TEDGlobal in Glasgow, Daniel Pink gave a fascinating talk about the science of motivation and incentives.
You can watch the whole 18+ minutes here:
If you want to cut to the chase, the money quote is at the 13:15 mark:
(the traditional notion of) Management is great if you want compliance. But if you want engagement, self-direction works better.
Not surprisingly, here at hubbub we tend to agree, which is why we have 5 categories of activities to choose from and let you choose what you want to do and who you want to do it with.