Q - What I don't understand about having people "testify" to congress is that nothing ever happens. They lie with impunity, congress does nothing, and they go on. It was good for people to see the Demonic demeanor of Peter Strzok, but the hearings were a waste of time. Nobody ever says anything that really matters in these hearings.
And they can be prosecuted for not cooperating with the IG when they are still Federal Employees. That is why they were not fired immediately.