Except that some of the economically best taxes are land-value & wealth taxes — and what are savings & investments other than wealth, often in the form of land?
I actually support LVT, as well as analogous taxes on resource extraction and other forms of rent-seeking. So if you invest in the oil and gas sector, you’d be investing in companies that will have massive tax liabilities and lower profits, which will reduce the value of their stock and the level of dividends you receive. And yeah, if you buy some land with your savings—well, that saved income turns into taxable income and then you’re on the hook for LVT as long as you keep that land.