I think even more important than the difference in taxation is the difference in freedom of movement. There are heavy restrictions on labor moving between countries, capital has no restrictions at all (except kinda in China) and can move instantly to wherever it is most useful, i.e. wherever has the most human rights violations and lowest wages. We need to eliminate this asymmetry: either get rid of all restrictions on freedom of personal movement and selling ones labor, or lock down the flow of capital with serious capital controls.