I think we might be talking past each other. I mean "exists" in a pretty weak sense. If you present people with complex economic choices, they make rational ch

I think we might be talking past each other. I mean "exists" in a pretty weak sense. If you present people with complex economic choices, they make rational choices and maximise their economic utility. IE if they are using second hand computers running hacked up linux to play movies on their TV and a good, cheap alternative presents at a lower price, most will eventually switch to that. Describing them as such allows us to predict their behaviour.