Wealth is harder to measure because it's not as reported in most countries. You get an 'income slip' for tax purposes (e.g., US Form W-2), but there's no official 'wealth slip'.
That's one of the things that Piketty suggests: declaring of credits and debts in an official way, which could then be used for a (net) wealth tax. Starting as little 0.1% if you're just over (e.g.) $US 10M, and having a top rate of (e.g.) 2% for those that are worth more than (say) US$ 1B.
* https://en.wikipedia.org/wiki/Capital_in_the_Twenty-First_Ce...
Wealth is harder to measure because it's not as reported in most countries. You get an 'income slip' for tax purposes (e.g., US Form W-2), but there's no official 'wealth slip'.
That's one of the things that Piketty suggests: declaring of credits and debts in an official way, which could then be used for a (net) wealth tax. Starting as little 0.1% if you're just over (e.g.) $US 10M, and having a top rate of (e.g.) 2% for those that are worth more than (say) US$ 1B.