The average middle-class capitalist moron view of economics is when you get rich the government fires up it's money machine and delivers you sacks of cash. The only thing keeping us all from getting our own sacks is momentary inconveniences and they too will be rich one day just as soon as they [fill in a thousand blanks.]

A billionaire has deprived vast numbers of people of something. You do not hold onto a billion dollars in your hand without the knowledge that some... or most of that would have paid for medical procedures, some of that would have been baby formula, medicine, overdue rent payments, gas to get to work for a struggling family, heat and water bills and so on. But you have found ways to skim that money from enough people that few notice. Because you don't miss something that was intercepted before it made it to you.

You simply cannot ethically hoard money.