Lets just let it go to the limits of the argument then. Why tax them at all right? Why have them pay a dime in taxes? They could get scared and shoo off like startled birds after all. Lets not let them pay a dime in taxes then. Free tax USA if you clear a billion dollars.
You have no problems with that proposal, right? Or, are you going to argue in favor of taxes? But, what if they leave?