A straight wealth tax would be the best of all. Nobody can ever tell me what the rate would be though and pretty gritty when you get down to the details. 1% of total net worth? 10%? 18.9%? per year, maybe 10 years to pay, so in 2026 you would finally pay off 2016 liability. Because some of that net worth is very difficult to liquidate.
If that happened, there would be a mass exodus of wealthy people and some country somewhere (probably Hong Kong, Singapore, China, most central and south American counteries) would happily welcome those people and the wealth that they bring. Also, more time and energy would be spent on hiding wealth (gold, bitcoin) than obtaining it. A wealth tax would really discourage work much more than an income tax. Why work or take risk if given enough time, the government will eventually take away all the compensation earned. I'm sure some country will try it though...maybe it's not too late to buy Bitcoin.
There's some study that throughout US history, no matter what the tax rate, no more than some rate...I think it was 20% of GDP is collected. That means that at some point, higher tax rates lose their effect. Have to google it though, I don't recall the exact study.
