As the article explains, the Inspector General (IG) watchdog system was instituted in the wake of Watergate to provide independent oversight of 72 agencies in the executive branch of government: i.e., so the President cannot become the Emperor, and secret operations would not be conducted by the agencies, because they could be unmasked.
Other Presidents chafed under the IG regimen; Reagan fired 15 IGs. But Obama has thrown the biggest wrench in the works so far, advising agencies to "Just Say No" when the IGs ask for agency records to learn what the agencies they oversee are doing.
The ramifications are huge. What can be done with a 3.8 trillion dollar federal budget when no one is looking? Here is the piece in full: