What would be an appropriate reaction to this workplace situation involving dress code violations and hypocrisy?

I work at an office where the Office Manager is in constant violation of the rules and regulations, but deals heavyhandedly with everyone else. One of the main complaints the other employees have is that she consistently violates the dress code. At our next staff meeting, we planned on bringing up this fact. Today, in a meeting with the partners of our firm, she requested that the dress code be amended to allow capris, leggings and jeans on Fridays – telling them that it was to “improve morale” and that we’d all asked for this and it would mean a lot to us. In fact, none of us have asked and what we actually want is for her to have to abide by the dress code (business casual), which is fine the way it is. In fact, our very complaint was that she wears ratty capris and leggings constantly and has been doing so without comment from them for years, while the rest of us have adhered to the rules.

They approved the request, and therefore she has succeeded in her self-serving quest to have her rule breaking sanctioned. We are all very angry about this because they not only have been oblivious (intentionally or otherwise) to her violating the dress code, but now are pretty much rewarding her. Would you react to this situation? If so, how?