Copyfarleft and Copyjustright

"Challenges to traditional copyright resulting from peer-to-peer applications, free software, filesharing and appropriation art have caused a wide ranging debate on the future of copyright. Dmytri Kleiner brings existing critiques of material property from the left to bear upon the realm of copyleft artistic production and asks how, within the existing copyright regime, can artists earn a living?...

A copyfarleft license should make it possible for producers to share freely and to retain the value of their labour product, in otherwords it must be possible for workers to make money by applying their own labour to mutual property, but impossible for owners of private property to make money using wage labour.

Thus under a copyfarleft license a worker-owned printing cooperative could be free to reproduce, distribute, and modify the common stock as they like, but a privately owned publishing company would be prevented from having free access...."