If you pay taxes with gold coins at their face value instead of paper dollars (i.e. taxes total being equal coins face value total), you effectively end up paying more than you would pay if you previously sold your coins at their market price and paid the original tax plus the tax due to the commodity value of your coins.
And who would be stupid enough to do that?
People are stupid, but that not that stupid. Most of them can count.
This doesn't render payment of taxes with gold coins at their face value either impossible or eligible for taxing the commodity value of them (which was your point). You can't pay an income tax on an income that you didn't get (that was my point)...
Actually your entire thesis is incorrect and you missed the point of the links I provided in a prior post.
If someone pays you face value for your gold coins, you and they will both be taxed as if you gave them incremental commodity value as a gift. So they will pay income taxes on that portion.
My links showed someone tried to pay payroll using face value of coins and it was ruled he under-reported payroll.
There is no escape for this. You must include the commodity value in the tax calculation when it is transferred.