After studying article, reply to given questions:
1. In today's world with private companies specializing in delivery of packages (FedEx, UPS, etc.) does government still require to be involved in delivery of mail?
2. Does postal service represent the "productive function" of government (that is the good or service which can't easily be given through private markets) or is this example of government trying to give the service which would be better left in hands of private enterprise?