Copyright was intended to, as the Constitution states, promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive Right to their respective writings and discoveries. The problem is that locking up ideas as property doesn't do that at all. It stifles progress. Besides, all Hollywood and the recording industry make is frivolous entertainment. That bears no resemblance to what was meant by "useful arts". Congress doesn't even consider the copyright clause when lobbyists show up with cash.