Also the gov creates more supply to the dollar than the tax demand always, so its not really clear. And most taxation is a percentage of income or value measured in dollars itself.
This argument never clicked for me: where is it coming from?
The intrinsic value of USD is consoling, because it prevents the value of USD dropping to 0, hence there will always be a possibility of the emergent value reappearing.
It's also worth pointing out that income doesn't always translate to inflows of physical dollars. Complex corporate accounting standards often result in recognizing revenue before any cash is received, and non-cash transactions that affect income.