You replied to the wrong person. But to address your point, what is wrong with the situation you describe? Doesn't that just prove that the cost of government is higher than society will accept? Doesn't it show the unfairness in today's system with half of society carrying a burden that all of society would deem unacceptable if they could plainly see it?
What better way can you propose to drive spending reductions?
It proves that the NRST will not work since it has no safeguards. Without safeguards, the rate will rise to compensate.
Payroll tax withholding is a good example of such a safeguard. Ask yourself if the federal government would collect the same amount if people payed their taxes like they do their mortgage.