Everything above 999 goes to the government. In return the would-have-been a billionare gets their name on a park. Hopefully that gets 999ers to care for their parks as they are the only symbol of status
Anything more gets taxed 100% and redistributed.
It's enough money for a good life and some measure of luxury, and presumably it will force prices down so things like housing will become more affordable, but it isn't enough to buy governments or private sex islands.
Unless the price of governments and private sex islands also goes down. But even then the market is more competitive and something something free market. I admit I'm not an economist, it just seems right. Then again sometimes full socialist revolution also seems right.