I suppose if you mean traditional income, but he gets tens of billions of dollars per year in capital gains. I remember a few years ago he said "sure, I paid three billion dollars in taxes last year, but I should have paid more". I read about ten years ago that he donated $10 billion dollars to charity and his net worth still went up $9 billion. His financial holdings are so enormous that his net worth still increases regardless of giving away ridiculous sums of money. I remember Chris Rock talking about Gates a couple decades ago and he said "you can't get rid of that much money. You can't give it away fast enough to lose it", and that's a pretty accurate statement.