It was a barrier to nonparticipants from meddling in markets. Leveraging differentials to siphon auxiliary wealth drains said markets & raises prices for the pa

It was a barrier to nonparticipants from meddling in markets. Leveraging differentials to siphon auxiliary wealth drains said markets & raises prices for the participants involved. Then add the spurious actors who create artificial events(shortages) to further leverage returns. That's where bubbles appear & without said barriers the world economy has been, still is, broken twice now.