I just saw this quote from Supreme Court Justice Brandeis, and it couldn't be more appropriate to the significance of the whole IRS affair.

In a government of laws, the existence of the government will be imperiled if it fails to observe the law scrupulously. Our government is the potent, the omnipotent teacher. For good or ill, it teaches the whole people by its example. If government becomes a lawbreaker it breeds contempt for law: it invites every man to become a law unto himself. It invites anarchy.