I've never argued any such thing. What you talking about, Willis?
That's exactly what you've been arguing. That's the only way to make the "FairTax" math work. Otherwise, you have to explain how a sales tax will generate the same amount of revenue as the individual income tax while not increasing the cost of goods.
So just to be clear, so you don't care what you make after taxes, only before taxes. You don't incorporate that into your salary needs for your employer. As I pointed out businesses factor in all their costs, but you don't. You know what your mortgage is, your car payment, your food bill and you ask your employer for enough to cover that. You do not ask them to cover your taxes, that's your problem and you don't expect them to pay you anything more to cover for that. That's what you're telling me.
You're making two different claims and hoping no one will notice. Of course I care about what my after-tax income is. And, at the margin, that means I will want a higher pre-tax income, ceteris paribus. That does not mean that my employer pays my taxes for me.