This thing won’t be recognizable by the first primary.
For example:
Then do the same for ALL state taxes...
First it's zero income tax for the "poor". Then it's zero sales tax for "necessities" like food, baby formula, diapers, etc. Then it's zero corp taxes for businesses that set up in "empowerment zones".
Of course, the lowering of revenues due to these exemptions will mean raising the tax rate to 15 or 20%. At which point we're right back where we are now.
Either the plan firmly comes with no exceptions, or forget it.
I think it would be best to have a tax code that taxes on the first dollar, even for the poor. That way, when somebody proposes raising the tax rates, it will be felt by EVERYBODY. We got into our current mess precisely because 50% of the population feels no direct effect from taxes.