amadeus
Apply directly to the forehead
In your scenario, you've inadvertently destroyed 90% of the potential charitable contribution and the pension funds of many people and quite possibly jeopardized the solvency of Berkshire-Hathaway itself. What good has this contributed to society?I've heard this argument a few times and its never hit right to me. "Oh those poor billionaires, they want to give away all their money see but you see they can't because market forces, its so sad!". Honestly, even if Buffet gave away all of his wealth and it lost like 90% of its value, that's still 7.27 billion USD. Imagine the amount of good one could do with that kind of money.
If charitable endowments grow as a result of sound investment, it can do more charitable good.But lets pretend that you're correct and that it is physically impossible for the billionaires to give away more money to charity than they earn. Warren Buffet is 89 years old so he'd be lucky to make it to 2030. Lets say in 2030 he dies and he gives away all his money to a big trust that's meant to burn through all that money and give it to charity. But by our earlier assumptions, that is physically impossible. Simply through inertia it will grow bigger and bigger for all of eternity (short of someone messing up and wasting all the money on bad investments).