Exactly, that's not a free speech issue, and talking like that is cynical.
So that's a great freedom.
What you're saying is the other way around.
The talk a bit about it here, https://www.irs.gov/Tax-Professionals/The-Truth-About-Frivol...
And this is kind of similar but about the 5th Amendment. http://openjurist.org/775/f2d/1292/eh-mosher-v-internal-reve...
Or to put it another way, compelling speech is denying the right to send the null message.
Noone cares about the "null message".