Yes, let's create a system where only a few actually have skin in the game. I'm sure that will work swimmingly.

Meanwhile, a large double-digit percentage of workers already pays no US income tax.

They pay use and payroll taxes. Actually, just moving more of the tax burden over to graduated income and wealth taxes would go a long way to equality. Just taking health insurance into the public system would help. There are lots of easy things we can do, millionaire taxation is kind of just a distraction/strawman.

The wealthy and powerful will never vote to disenfranchise themselves. This will go exactly nowhere. Wealth and power protect themselves and always will.