[shpiel]

This is a false equivalency. Musicians can opt out of having their music played on the radio. If they do choose to have their music played on the radio, there is a genuine attempt made by radio stations to track how often their music is played and make a commensurate royalty payment to the artist. (source I worked on college radio).

[ekianjo]

Well, OK, but then nothing prevents anyone from copying the radio stream in one way or another and playing it over and over again for free without telling the artists. It still remains "free" in that sense.