You're still assuming a world where copyright exists. Are you unable to think outside of those bounds? Do you not see that perhaps you wouldn't even attempt to do this in a world without copyright because you'd know up front you can't make money selling it?
> The interesting thing is that the same argument can in fact be made for property.
No it can't. Property is physical, if I steal your car, you no longer have it. If I copy your novel, you don't even know it happened. Physical property and intellectual property aren't at all the same.
> It's related to labor, having spent x amount of time working to buy something.
No, it really isn't.