First, how much do they own?

And where does all that wealth come from?

It appears that most of this wealth is wrapped up in bonds, stocks and businesses, where it helps fund the country’s public and private investment and operations. If the federal government were to implement a wealth tax, rich folks would likely have to take money out of their holdings and businesses to pay the tax. Ideally, the holdings and businesses would not lose value as a result. A wealth tax might be doable if it were relatively modest. and did not lead to a sell-off of stocks, which would deprive pension funds and the federal government of much needed revenue. Then again, a modest wealth tax might not be worth the cost of enforcement.