I think you're missing the point. It's not collusion, it's simple socialization. But it's inherent in the station of being a property owner to want to extract a

I think you're missing the point. It's not collusion, it's simple socialization. But it's inherent in the station of being a property owner to want to extract as much out of one's property as possible, and through this simple socializing, ideas about what most effectively achieves that aim can spread through the networks of interested parties while largely remaining inside of them.