Daniel Pink is one of the world's leading business thinkers and the author of five best-selling books about work, management, and behavioural science.
Pink's 2009 talk on The Puzzle of Motivation is one of the 10 most-watched TED Talks of all time.
Watch his Autonomy, Mastery and Purpose video in which Pink describes what motivates us to work and states how, for non-trivial tasks, higher monetary incentives tend to lead to worse performance.