Exposure Chris Christie's underlings' disguised retribution scheme has called attention to bad decisions that are clearly the responsibility of Christie himself.

I won't claim that Christie must have known about this particular scheme. I would not expect a governor to personally pay attention each specific action taken, whether ethical or not. However, he may have told, or led, his underlings over the years to plan various kinds of political pressure and retaliation and not bother him with the details. That would still make him responsible overall.