Earlier quoted context omitted.
>If you have a bucket of money that isn't doing anything, then what value does it actually bring to the economy Wealthy people don't just leave their money under a mattress, they invest it in something. Even if they just left it in a bank, the bank is still going to lend that money out and invest it. Taxing wealth just encourages riskier investments, as higher risk is needed to achieve comparable post-tax return.
Evidence points to the contrary: Taxes reduce profitability and therefore limit risk taking behaviour by companies. Same is most likely true for individuals because it reduces their income.
A wealth tax does not reduce income, it reduces wealth! Income taxes and capital gains taxes reduce income.