Bill Gates said if he were in charge of the US tax system he'd have paid 'tens of billions' more

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• Bill Gates said he would be billions of dollars poorer if he were in charge of the US tax system.
• He told the Independent that he wanted a more progressive tax system and estate tax.
• Gates has committed much of his wealth to charity and vowed to give his kids only a small fraction.

Bill Gates, one of the world's richest people, said he would be much poorer and would have paid way...