Oh, and by the way, you have it completely backwards -- if Rob's analysis is correct, Jorgenson still maintains that the prices will drop by 20% or so, but that employees would not receive their currently withheld income and payroll taxes.
Of course, that would violate a large body of contract law, but that's probably because Jorgenson just makes an assumption to make modelling the changes easier, not that this will necessarily be the case in practice.
No kidding, we have only been debating this point for 6 years