so much trouble that he has to co-write his books in order for the IRS to not take all his money.
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The very highest tax bracket is 35% at over $350,000, so the IRS doesn't take all of anyone's money. No one pays 35%, but if he did, he'd get to keep $227,000 every year. His agent's commission is of course, deductible. For evey million he made, he could keep over $650,000. I doubt that this would cramp anyone's lifestyle much.
If he moved to Ireland, he could keep it all.
It's too late for that now.