First it's about the money, then power. Imo, when the thrill of money and power is gone, you give it away.
I might add though, with money, there is much jealously among the wealthy. You have inherited wealth, earned wealth, old money new money, social responsble money, money made with vice industry, ethnic money, you name it, there's someone bitching about your money.
These people are nuts and if you think when you hit the lottery and move to the upper east side you'll gain acceptance, fugheadoudtit.
So the quest goes on for more money to gain acceptance, then power, so people will respect your money and who you are.