Sir Paul McCartney and Heather Mills spent much of their four-year marriage arguing about why the former beatle didn't donate more of his millions to charity. Mills, who split with MCCartney in May, 2006 insists she was amazed her estranged husband didn't hand over more of his estimated $1 billion (GBP500 million) fortune to the needy. She says, "I was passionate about the power that Paul had; he could have done more for charity. Those are the things we argued about. "How could anybody have that kind of money and not do more for charity? That's what we argued about all the time."