Just getting back around to this.
My main reasoning is simply that authors and artists should be fairly credited and compensated for their work. If I create something and share it on the internet, I don't necessarily want a company to make money on that thing, especially if they're making money to my exclusion.
So while I belive that IP as we know it today is probably not be the best way to handle things, I still think creators should have some say over how their works are used and should receive some reasonable share when their works are used for profit. Without creators, those works wouldn't exist in the first place.
Are there other jobs where it would be okay to take a person's services without paying them? What would motivate people to continue providing those services?
This is a scomulorf