It's impressive you just looked this up on Wikipedia and grasped what the paper's authors who have PhD's don't seem to get.
Though maybe the authors know what they're doing and were under pressure to publish (publish or perish in effect?) so they just picked one of the more BS low-hanging fruit theorems in economics to poke holes in for the millionth time.
Though maybe the authors know what they're doing and were under pressure to publish (publish or perish in effect?) so they just picked one of the more BS low-hanging fruit theorems in economics to poke holes in for the millionth time.