You don't understand. The feds took a 25% cut off the top of my income a portion of which I then saved and now when I spend it I will only pay a 8% state sales tax (no state income tax). Now you want me to pay a 27% national sales tax in addition to the state sales tax. It's taxing money that has already been taxed. Of course future earnings will be exempt from the 25% income tax I currently pay, but that doesn't help me when I spend my already accumulated savings. You're taxing that when it came in and now you will be taxing it going back out again.
I appreciate your point of view, but the income left after tax now IS TAXED WHEN YOU SPEND IT beyond the 8% sales tax you see. You just didn't know it because it's hidden in prices. Estimates are that retail prices include 22% federal tax costs.
So you ARE already paying 22% of your after tax money in federal tax when you buy something. The nrst makes the federal tax component visible - it does't raise prices.
It's a replacement tax, not an additional tax.