I agree with everything you just wrote, so if I came off as contradictory it means I wasn't clear about something. When said "government says," obviously it was a bit of hyperbole, I really meant that citizens and government agree on a set of rights, pursuant to certain goals we have as a society, and how they should be distributed. Of course there are subtleties that I tried to gloss over, such as owning a patent vs. owning an idea---I was just trying to emphasize the fact that even ownership of material property is such a right, based on agreement, and is basically already an abstract concept, and therefore consistent with other forms of ownership that may seem more abstract.