[Sanguinaire]

It's not about petulance, it's about motivation. I'm in a similar position to the author but acting more like you would want; I care about being good at my job and want to deliver because that is how I was raised, but there is a constant tension in me that this is the "wrong" approach since no company actually rewards loyalty or expertise, at least not nearly as much as self-promotion and being a corporate mouthpiece.

Regarding promotion and being indispensable, that cuts both ways - in some roles being impossible to replace also means you are impossible to promote, since the next step up the rigidly defined corporate ladder may not have sufficient overlap with your current role.