If there are economies of scale in delivery, and certainly if mail recipients do not want multiple carriers accessing their mail boxes, it would be possible to define routes, along with their expected workload, and auction them off to the lowest bidder.
It would be possible to define routes, along with their expected workload if pigs could fly.
mnli hypothesis: It would be possible to define routes, along with their expected workload if pigs could fly. premise: If there are economies of scale in delivery, and certainly if mail recipients do not want multiple carriers accessing their mail boxes, it would be possible to define routes, along with their expected workload, and auction them off to the lowest bidder.