Sorry for shouting but it's clear that, without exception, private enterprise always beats a government-run entity. Look no further than public schools compared to private schools. Likewise, the artifice of the taxpayer-funded Postal Service stifles what would otherwise be a very efficient, cost-effective delivery system with the likes of FedEx and UPS going head-to-head in a free market to offer consumers real value.
Thomas Jefferson feared that the postal service would become a source of patronage and a waste of money. Jefferson also expressed doubt at granting Congress the power to designate post roads, as he considered road building to be a state responsibility.