Below is a talk from Dan Pink given at RSA, illustrated by RSA about the hidden truth behind what motivates us. Surprisingly or not, money alone doesn't make the world go round. But the question is to what degree are you motivated by the various factors? I believe some are more motivated by money while others are more motivated to have a purpose. Where do you stand? Check the vid and article below.
Excerpt from Core77, "In the video above, author Daniel Pink cites 50 years worth of behavioral science research demonstrating that money is only a motivating factor to a point for getting good results. After that people seek autonomy, mastery and purpose to be fully productive and indeed happy."
Further discussion between Clay Shirky and Daniel Pink, who both have books on the topic, on Wired Mag.