An Irish-American billionaire who kept his philanthropy secret for 15 years has given away $7.5billion (£4.9billion) and plans for it all to go to charity before his dies. Chuck Feeney, 82, wears a $15 Casio watch, travels in coach, does not own a car is a self-confessed 'shabby dresser' and sensibly made his children work their way through college.