Earlier quoted context omitted.
Because it's short sighted to over tax your citizens from both sides?
To this extent, countries compete on taxation and value-add for services. Perhaps country A charges more in taxes, but offers more education to its people, and a more educated workforce to hire from, while country B offers fewer of those amenities in exchange for lower taxes. Inter-country competition helps to keep them honest, and corporations get to choose the luxury of where they operate from and do business out o…
There's value in competition, because it's about the closest we've been able to get to evolution. The issue comes about when competition is lopsided - I can understand the complaint here from the French, but I don't care at all for their solution.