Ah yes. We had license for public broadcasters tried in Denmark. Turned out that it resembled a tax. There is this law, that only the official tax agency can collect taxes, and now license for public broadcasting is collected over the tax.

Regardless, this seems to be a form thing.

Also, I am quite sure that the law is a bit more formal than cannot collect unfair taxes (in what case, all taxes collected on me are unfair, but taxes collected on them are fair)