The evolution of the postal service was an important milestone for international communication networks and how they are governed, and like the internet, utterly revolutionary in its day.
The postal service today suffers from many problems, and faces competition from private entities that are faster in delivery, but the very regulation that govern its operation still offer some advantages over FedEx, UPS and the like. the extensive regulation does not seem to have a substantial effect on the success of the alternatives.
the UPU is the second oldest international organization worldwide. and has survived two world wars, not all regulated fields are alike.
I think the idea of Net neutrality is important and should be pursued, ideally as an international agreement similar to the UPU - http://www.upu.int/