Erasing retirement accounts and causing a depression due to a market crash when the wealthy respond to the change? It's a tax on money that doesn't actually ex

Erasing retirement accounts and causing a depression due to a market crash when the wealthy respond to the change? It's a tax on money that doesn't actually exist yet, and may never exist if the stock price goes back down before you sell it. This makes investing too risky so the wealthy are going to find other ways to handle their wealth.