Income is not simpler, as you can change around how people are compensated, which is exactly what's happened for the better part of a century at least [1]. But

Income is not simpler, as you can change around how people are compensated, which is exactly what's happened for the better part of a century at least [1]. But if you own a garage full of Ferraris, then you own a garage full of Ferraris. The only problem at that point would be foreign held wealth. [1] One of the reasons the US got into the health care mess they have now was companies taking over the payment of health insurance instead of giving a salary increase. Workers liked this because it effectively meant they paid less taxes.