Bill Gates has already given away a huge chunk of his money, and will have given away the vast majority of it by the time he dies.
But the Foundation actually increases the amount of money he controls rather than reducing it. Granted there are restrictions on what he can do with that money, but as I pointed out before the rules permit him to use that money to exercise political influence and enhance his personal reputation. These things are of more value to Bill than buying another car or house.
Secondly, it's his wealth. He wants to see it go where it will do what he wants.
You seem to be contradicting yourself here. How can it be his wealth if he has given it away?
Thirdly - whatever douchebag. He's never been convicted of any kind of felony, and neither has Microsoft.
Microsoft has been found guilty of criminal behaviour (under Bill's watch) in both American and European courts.