Under the presumption that the postal monopoly applies in its clearest form only to the final delivery process , where scale economies are likely the greatest , the worksharing notion is that a discount should be offered to mailers or competitors1 who do portions of the postal work and then turn the mail over to the postal service for completion of delivery .
Under the presumption that the postal monopoly applies only to the final delivery process , where scale economies are smallest , no discount should be offered to customers .