Well, they have, Mr. Scott.
While TSA cites security concerns regarding the sharing of data with their own OIG, the truth is, in order to guarantee program effectiveness, someone needs to watch the watchers.
I understand the need for secrecy with regards to "the enemy", but hiding failures behind "it's classified" is a tactic that's as old as clandestine work itself. That is not to say critical failures should be made public, but as said above, there needs to be oversight in order to maintain a program's effectiveness.