This is exactly the problem I have with any "federal sales tax" program: the airgap between what I'm buying and automated governmental analysis thereof shrinks

This is exactly the problem I have with any "federal sales tax" program: the airgap between what I'm buying and automated governmental analysis thereof shrinks to sparking distance, thanks to instant rendering of tax coupled with inevitable "requirement" to adjust that tax based on arbitrary legislated factors. Buy a six pack? healthcare premium increases. Buy health products? get a tax credit. Buy fertilizer? auto-crosscheck your recent contacts against known terrorists. Made your purchase sooner than speed limits make possible from your last known freeway location? pay your fine first.