Wealth tax would force business liquidation to foreign money
Business valuations would plummet nationally because everyone would be trying to liquidate, because other owners must also liquidate to pay the tax, so no one would have cash left over to buy up these pieces, except foreign investors coming in to gobble them up.
So, Americans would lose interest in their own businesses (heaven forbid the government accepting payment of the wealth tax in shares, ie TAKING OVER their businesses). It wouldn't be a wealth tax as much as an economic crash, giveaway and takeover.
If someone cannot pay and cannot liquidate, then the government might seize their businesses(government controlled means of production has often lead to fascistic massacre in the past).
Also, how would you calculate how much a business is worth EVERY YEAR? It's worth what people are willing to pay for it. That would be wildly dynamic especially in the feedback loop of the mass liquidation.
It's such a terrible^squared idea that sounds so benevolent.