I don't think copyright law implies that "ideas" can not be copied. I think it says something about the "expression of an idea". It is always up to the court to decide whether copying was "substantial" and not "fair use".

I agree that both laws and their application have gone too far. I think they should be reformed, not thrown out all together.

There's a third law less often opinioned about: Trade Secrets. Is that a just law or not? Well think about the laws on privacy. Should we have the right to "privacy", which is really a rather intangible thing?