Ok a sales tax with no limits and no exclusions.  You buy a house for $500,000. and pay a 10 percent sales tax = 50K.   You buy a car for $40k - 4K sales tax. Sure let's do it. Except for one thing...people will do everything they can to get around it....buy online, buy out of state, many businesses will go belly up. All businesses will buy everything outside. Stupid idea.