Impeachment would be empty symbolism.
The House has the authority to arrest people. I think Boner should keep his mouth shut and make these perps squirm with fear they might be arrested. I think Boner should THREATEN them all with arrest, including Lois Lerner. They’re all a bunch of F’ing LIARS, CROOKS and THEIVES!!!
Sometimes symbolism is important. Just as perception is reality.