Trees may always grow to the sky, but "unelected bureaucrats" haven't unlimited taxing power (in fact none at all) as that takes congregational action. But your assumption that the rate they get to specify will always increase as an additive amount that would increase the total FairTax rate beyond the 23% isn't justified as explained in the three posts above.
You love pointing to your old posts where you showed nothing of the sort. I pointed out the language in the bill which clearly states otherwise. You can't refute what the bill says, so you point to posts what pigdog says. Well, what pigdog claims the bill says don't mean squat. What the bill says does.