 According to his proposal, privatization would cut costs and give the financially burdened agency greater flexibility in adjusting to the digital age.Article I, section 8, Clause 7 of the United States Constitution grants Congress the power to establish post offices and post roads, which has been interpreted as a de facto Congressional monopoly over the delivery of first-class residential mail—which has been defined as non-urgent residential letters (not packages).Accordingly, no other system for delivering first-class residential mail—public or private—has been tolerated, absent Congress's consent.