Here is an RSA Animate video of Dan Pink talking about the surprising science of what truly motivates us. Through his research Dan discovered that once people get paid enough to be able to think about work there are three motivating factors that improve performance: AUTONOMY, MASTERY and PURPOSE. Companies that flourish tend to be animated by the Purpose Model. While companies whose profit motivation gets disconnected from purpose tend not to do such great things.
In essence Dan seems to bring it down to this. Treat people like people. Pay them well. Supply them with purpose, autonomy and plenty of opportunities to practice mastery and contribution. Get out of their way and you will have an organisation that makes people financially better off as well as making the world a better place.