The UN doesn't actually have any power though. Even if all the UN members agree to sanction countries that don't implement the tax there are countries like Nort

The UN doesn't actually have any power though. Even if all the UN members agree to sanction countries that don't implement the tax there are countries like North Korea and Iran that are already fully sanctioned. These countries would immediately take full advantage of the comparative advantage given to them. PoW mining for example would end up being completely centralized in these countries.