I understand what you're saying, however, it's not everybody's ambition to be very rich or on the rich list. For many people, they may simply want enough money to get by and enjoy life.
I was listening to a lecture by a famous marketer the other day and he came up with an interesting comment:
* People have ingrained into them from an early age that money is the root of all evil, and that they should stay away from it as much as possible.
There are plenty of other reasons, I've just listed one here. But it is a very interesting point for discussion.