I'm not sure you've understood the idea. While your values include not breaking certain rules of ethics, your value ALSO clearly extends to being offended by others when they do it. So your value isn't purely "don't break ethical rules", but, "observe ethical rules and react when they are broken, by me and by others". I think what the author (not OP) means is that once you are virtuously selfconstituted, your decision about these and what YOU do about it is not easily swayed or pushed around. In this sense, it shouldn't matter that _others_ are breaking rules... obviously it isn't an ethical rule for them... but that you are clear that you wouldn't do the same. Thus, if your activities at work relate to pursuing goals aimed at by these broken rules, then it is _work_, and you do your work.
Another way of interpreting what you've shared is that what you are stressed about is actually _not quite the value you think you have_, otherwise you would have walked away, self-assuredly, emotionally certain in the rightness of removing yourself. But you haven't. So it isn't a set value. Obviously another value like, "I have to eat" preempts this ethical value being broken at work. I'm not saying this is wrong or not, just trying to help you navigate your stressful environment.
Another way of interpreting what you've shared is that what you are stressed about is actually _not quite the value you think you have_, otherwise you would have walked away, self-assuredly, emotionally certain in the rightness of removing yourself. But you haven't. So it isn't a set value. Obviously another value like, "I have to eat" preempts this ethical value being broken at work. I'm not saying this is wrong or not, just trying to help you navigate your stressful environment.