1) Often certain music is played simply as a "cultural reference" -- e.g. making fun of it, having it in the background shortly for dramatic or comical effect, and so on. I would think most classify as fair use; however removals will likely be irrevocable and done with parsimony.

2) Even if the broadcaster would like to give up some of his revenue for copyright, he won't be able to. It just doesn't make much economic sense for large brands to issue small licenses, yet it does make sense to go after small violators since they're allowed to do it en masse.

The point is, viewers lose culturally and copyright holders don't actually gain anything.