Everything I read says this is an ADDED TAX, not a redirection of your tax (like the check-box for public campaign financing on a US Income Tax form is a redirection of some of your tax).
I think you are the one who is ignorant of the issue here... either that or all the Germans quoted in all the articles I have read (who live there and actually have to pay the tax) are wrong.
I’m betting that it is you who is wrong, not the German taxpayers.