Call it what it really is, greed
they have money and they want more of it. The more the better, get it anyway they can no matter what.
Just like those Enron execs, and other execs. Sell the stock before the public knows the company is going under. Cook the books. Cheat on income tax. Embezzile money from the company, or use company funds to buy houses, boats, cars, etc. Not to mention giving each other bonuses and pay raises.
This is not news, but recently it has gotten the attention of the media since the Enron scandle. Often overlooked because the wealthy can pay high priced lawyers to try and get them off the hook when caught.
"Lady I only speak two languages, English and Bad English!" - Corbin Dallas "The Fifth Element"