Earlier quoted context omitted.
Or, just get rid of sales tax anyway. It is the 2nd or 3rd time the same money has been taxed, depending on how you view it, and it's pretty ridiculous that a person with $100 in their bank account (post-taxes) still does not have the equivalent of $100 of purchasing power.
It’s the transaction that is taxed, not the money. By your logic I shouldn’t have to pay income tax on sales because my customers already paid income tax. We could simply the whole thing by just making dollar bills worth $0.66.
People often believe that because something has been for a while, it must always be so. Not too long ago we didn't have sales tax (introduced in the 1950's), and things were fine.
You are taxed on your income, and you are taxed on your expenses. If you invest that money or do anything productive with it, it gets taxed again. That's such a ridiculous idea - pick one and stick with it. Make it whatever percentage it needs to be, and that's it.
When someone looks at their bank account - that ought to be the final word on how much purchasing power that individual has. It shouldn't be handwavy minus 7-12%.
Mind you, that's 7-12% in addition to the 20-30% you already paid.