@rpluim @codinghorror "oops, my income is all foreign and 'already taxed' " through the extremely common practices detailed in the Panama papers and subsequent scandals.
As long as countries allow foreign bank accounts to do whatever they want, nothing will change. The rich can borrow money against assets with unrealized gains at rates like the common person gets as a pitiful savings account interest. (Essentially zero)
The common person also has to pay taxes on unrealized gains (property tax)