An executive branch Inspector General played a critical role in exposing the IRS's practice of targeting Tea Party groups, says Kathleen Clark, JD, anti-corruption expert and professor of law at Washington University in St. Louis.

Clark
“As we see with the IRS controversy, an Inspector General investigation can cause heads to roll. Perhaps that's why some government agencies have been without an Inspector General for a very long time - measured not in months, but in years.” Clark notes that the State Department has been without an Inspector General for more than five years.