There are two aspects to money. Money as a goal and money as a reward. Rewarding people with money with bonus' just doesn't work. People become dependant on th

There are two aspects to money. Money as a goal and money as a reward. Rewarding people with money with bonus' just doesn't work. People become dependant on the bonus, growing to expect it for no extra effort. fail. Using money as a goal works as part of a package of goals (for most people). If you sell it as 'solve this problem, save the world and we'll be rich' it works. The money is a result of their efforts. There are a few people who are purely motivated by making money for themselves and that's fine. They will either be very rich or very unhappy (that's a logical or so they can be both rich and unhappy).