Bill Gates says he has paid more than $10 billion in taxes over a lifetime but billionaires like him should pay "significantly" more because they benefit more from the system. Justin Tallis / AFP
Bill Gates says he has paid more than $10 billion in taxes over a lifetime but billionaires like him should pay "significantly" more because they benefit more from the system. Justin Tallis / AFP

Bill Gates: Billionaires should pay more tax not less