Whose "well established fact"?? Yours? Show me the money.
OK, here's the 'money', Money Magazine:
In an eight-year-old study paid for by AFFT, Harvard economist Dale Jorgenson noted that because the taxes paid by everyone in the chain of production are embedded in the cost of goods, prices could decline an average of 20 percent if all those taxes were scrapped.
Not that this is an important point, because there are hundreds of links which show fairtaxers quote Dr. Jorgenson as the main source for the embedded tax claims, including Linder and Boortz and fairtax.org. The extent of your denial is unbelievable. You really can't be serioius, at least I hope for your sake you are not.