You don't play Mario Kart just for crossing the finish line. The whole process is fun! Life should be the same. Work doesn't have to feel like work.

It only does when we are no clear what it is we want and we don't choose wisely how to get there. "Being rich" isn't really a fulfilling goal, it's just like crossing that finish line. You'll feel good when you get there....and then what. So "getting rich" doesn't really serve as good motivation for most people to have passion in the dirty details because it doesn't carry any emotional weight.