Let's face it. The people who benefitted most from 911 (being given unlimited power and spending) were those who investigated themselves for it. At the very least, as OzmO pointed out, they simply hid their own incompetence. This means they should be fired, and not receiving a govt paycheck. Are you okay with this social welfare, allowing unqualified/dangerously unprepared people at the helm? You're okay with your tax dollars paying their salaries?
At the very least, if it was complete laziness and incompetence on their part - we should know that. A second investigation would show that.
it's funny that some people dislike he thought of a second investigation when the very men who did the first invistigation now admit it's very much flawed. If the writers of a document don't stand by it - why would you?