The key idea of The Postman is that the United States Postal Service is more than simply a service to deliver mail and packages, it is a powerful symbol of our united nation. So much so that in a fragmented post-apocalyptic world, men wearing the uniform of the USPS and carrying mail from community to community can be enough to jump start the economic, social and political unification of a country.
The U. S. Postal Service provides enormous practical benefit to Americans regardless of their economic or social standing. In fact the lower your economic and social status is the more you may benefit from the USPS. Every address and community, no matter how small or rural must be served by the USPS. If you don't get home delivery and can't afford a post office box you can still get your mail general delivery at your local post office. We may not be big senders of cards and letters in this age of digital communications, but we still do business by mail, pay bills by mail, get checks by mail, get medications by mail.
However, the real point here is that far above and beyond the practical benefits of the U. S. Postal Service is the symbolic role it plays in our sense of all being citizens in one nation. There are several examples that highlight this. One is the degree to which Americans have mythologized the Pony Express, a service that lasted a mere 18 months (April 3, 1860, to October 24, 1861), that tied the eastern United States to the relatively new state of California. For something that lasted such a very short time, the Pony Express lives in the American psyche as the epitome of nationhood - physically linking states together across a wilderness. Another is the beloved Christmas movie Miracle on 34th Street in which the U. S. Postal Service delivers bags and bags of mail addressed to Santa Claus to Kris Kringle in the court room. If the mighty U. S. Postal service, an official government agency could recognize Kris Kringle as Santa Claus, then that was enough for the judge.
All those people salivating with dollar signs in their eyes, over the prospect of carving up the business of the Post Office and distributing it to for-profit corporations, miss this very important fact about the U. S. Postal Service. It is far more than a set of services, it is part of the fabric of America, and it is a symbol of our national unity.
If we lose the United States Postal Service we lose our national soul.