[eru]

> Looks at tax revenue vs GDP. No matter the tax rates, the percentage stays the same (fluctuations within a couple points) regardless of official tax rates.

That might perhaps be true over time, but it's not true between countries.

Eg Singapore has a much lower ratio of tax take to GDP than Germany.

> Universal sales tax is better. If the rich buy more stuff they pay more. There’s no loopholes to be found. You can also provide tax breaks to the poor by reducing or eliminating sales tax on consumer goods which greatly affects the poor, but only marginally affects the rich.

No need for a dual system, that just adds more loopholes. Just give pool people money, if necessary.

If you want an even simpler system, tax land value. https://en.wikipedia.org/wiki/Land_value_tax

You can't hide land, and it's in fixed supply.