Its news that human beings are self interested, ignorant, and vain? How did this ingenue become secretary of defense?
Here's a news flash for Bob Gates: People in Washington, running the gov. are no better/worse than the general populace. People don't suddenly become 'better' because they get elected to office, or go work for a congressman, or the white house. When you take the job of Secretary of Defense, you get paid for three things:
1. Up holding your duty to the constitution
2. Setting an example for your subordinates
3. Navigating the politics of government
If you don't want to compromise yourself, these things are all thankless arduous tasks. They wear you out. It goes with the territory. Cry me a river Bob Gates.