I doubt that considering the people (RIAA and Hollywood Liberals) who sell music at ripoff prices (hurting both the artists and the consumers) are Marxists.
Ripoff implies theft. The people using Napster/Kazaa are thieves, not the producers of the CD.
You have the choice to buy the CD at the price offered, or not. Nothing else.
You do not have the right to steal the work of the artist, because you don't like the price of the painting.