Employers won't pay you more than they have to, so you need to think about all this as you decide what's important to your career and plan your negotiation efforts much more strategically. It is a critical skill to learn if you truly want to be treated fairly, given opportunities and paid commensurately.
There are four basic ways people can deal with conflict at different times - competition, avoidance, accommodation and collaborative problem-solving. These strategies depend on the level of concern people in dispute have for their own outcome vis-à-vis the other party's outcome. (It's called the Dual Concern Model.)