Under the current system people can release everything they want as free use.

How much media that the average person choses to consume is this 'free use' media? How much is media that artists chose to make money from?

This doesn't do much for the argument that artists only do art for money. Everyone knows what happens to free use art, same as what happens to FOSS: corpos bundle it up and sell it back to people.

By the way, I do know a lot of artists that just give their work away for free. Hell, any Burn is just a bunch of free art that usually gets lit on fire or destroyed after a week. There's also graffiti art which is uncompensated and usually painted over within a month.