From Ken White at Popehat.
I’ve been seeing a lot of comments to the effect of “why should Lois Lerner take the Fifth if she has nothing to hide?” Ironically these comments often come from people who profess to oppose expansive government power, and from people who accept the proposition that Lerner was part of wrongdoing in the first place — in other words, that there was a government conspiracy to target people with the machinery of the IRS for holding unpopular political views. Such people do not seem to grasp how their predicate assumptions answer their own question.
You take the Fifth because the government can’t be trusted. You take the Fifth because what the truth is, and what the government thinks the truth is, are two very different things. You take the Fifth because even if you didn’t do anything wrong your statements can be used as building blocks in dishonest, or malicious, or politically motivated prosecutions against you. You take the Fifth because if you answer questions truthfully the government may still decide you are lying and prosecute you for lying.
This comes, remember, from a former federal prosecutor.