Earlier quoted context omitted.
The relationship gets even more complex because, along with going Galt, simply moving can be a viable option. If moving to Bruxelles from Paris is really easy, the impact of higher taxes in France vs Belgium may be felt very differently than if a) it were more difficult to move or b) there are no places to move to with lower taxes.
Exactly There's a point where packing and leaving is easier. And the richest the people, the easier this is. Governments have to realize that, at a certain point, they are in competition with other countries. Multinational companies and rich people come to mind. The rich can pay their way through most of the immigration burdens that prohibit the average joe from moving (yes, even to the US)
You're absolutely right about the ability of the rich to buy their way to the front of the immigration line, I just don't see it happening in significant numbers.