Anyone who truly believes altering tax policy will reverse a thousand generations of evolution is an idiot.
That’s the fundamental problem with modern libertarians. They believe this or they simply are incapable of mastering ground floor level biology. The reason the country of Niger is a basket case is that’s the way the people of Niger want it. It is full of Hausa. The reason Paris was Paris was that, up until recently, it was full of Parisians! Now that Paris is filling up with North Africans and Arabs, it is looking like Algeria with better plumbing.
It may turn out to be that the last vestige of France as we know it may be in the Légion Étrangère; the Foreign Legion has always had a minority of actual Frenchmen, but French officers were always in command.