AS I remember, there was a move during the Reagan years to get rid of the Postal System. The argument FOR the Postal System was: They guarantee delivery to every address in the country, regardless of whether it is easy or hard (mainstream or off in the sticks).
With the advent of Email, UPS, Fed-Ex, WalMart, and a host of other ways to send correspondence... I think that old dog just will not hunt.
I would be in favor of eliminating the PO... as long as we have a viable alternative that GUARANTEES to operate first class mail to EVERY address at the same price. IMO that should not be very hard for, say, Fed-Ex or UPS or WalMart... Actually, I see a consortium of co's working together in the future. Maybe even competition in first class letters between two or three players.
Imagine that... the fruits of competition in the Postal System.