In Canada, there are no states that have 0% provincial tax like Florida, you can add an average of 50% to the federal tax he would pay. It's also worth noting that he gave 15% of his income to charity having a huge effect on his taxes.
I also don't really care what his tax rate is, he is a very wealthy self made man who earned his fortune inside the rules of the day, he also pays his taxes as per the rules of the day. He came from a wealthy successful family, but I am pretty sure not the $250-350 million kind of wealth.
