That's not true. The post office runs just fine, and does it for far less money than companies like FedEx and UPS. In fact, whenever private enterprise competes with the government, the government does it at least as well if not better and for a lot less money (with the exception, some of the time, of public schools). Take the private contractors we are paying for in Iraq and Afghanistan, for instance, as compared to the military doing the same jobs.

Any time private (for profit) enterprise gets involved, the costs go up rather than down, and efficiency is not improved.