There’s just one flaw in your logic: You leave out the part where people who don’t pay taxes get to vote anyway.
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1) Indeed I might pay more, but if less of the GDP and corporate bottom line needs to be spent on taxes and compliance, I’ll make up the difference in more jobs and more pay.
2) The glorious part of 9-9-9 (correct me if I’m wrong) is that illegals, and welfare recipients pay national sales tax going forward, and the 9% national income tax means all kinds of people not paying now would pay, right?
I wouldn't count on it. It would be illogical and pointless to have the government pay itself sales taxes. So even if food stamps and other aid to people on welfare seems like it is taxable, in reality it won't be, because the paying entity is the same entity that collects the tax.
Sales taxes do capture revenue from anyone who is spending, and for consumers they are an easy anonymous tax, which is good. So anyone in the USA spending money provides revenue which is good. Of course making everything 9% more expensive may put a crunch on people who are barely making it now.
For low income working people, the 999 plan replaces their 7.5% FICA with a 9% tax. So they pay a little more. Their employer ends up paying a 9% income tax, which will include their payroll because of the way it is calculated, so the employer ends up paying about 1.5% more than he or she used to for the low income working person.
Well, that's true--in theory. In practice, I just can't see it happening. Some rat congressman would introduce a bill that would exempt illegals from taxes, including sales tax. Then there'd be an exemption for anyone making less than $40,000 a year. Before long, the entire income tax system, with all its arcane amendments and exceptions, would be back, just as before.