Josh Marshall at Talking Points Memo (link here) has a post indicating that Secretary of Defense Robert Gates is contemplating requiring American soldiers to sign no compete agreements when they enlist to keep them from serving a single tour of duty (and the training that entails) and then taking jobs with private contractors like Blackwater where they do essentially the same work but get paid a lot more money. I suppose that since national defense is a public good, the organization that provides this good is something of a natural monopoly, in which case, Secretary Gates seems to be suggesting that outsourcing these functions hasn't been a good idea.