Actually, the finance sector has this figured out better than most other sectors imo (just consider how much bonus they pay even their lowly analysts after working them to death). A good boss / company there ought to be more about earning money than having money, and so should spare no expenses rewarding employees who bring a lot of value to the corporation... So my point is you want an employer who has the character to reward everyone in the company (including him/herself) based upon some open and fair system of value contributed / need without being prompted, rather than someone who will pay you what he can get away paying you.

But deciding that most inner quality of character is difficult (since it's an hidden attribute on people), so it makes sense to look for various outward expressions of that hidden trait... one of which I postulate to be the question of whether your boss is in it for money, or in it for a vision. In the finance sector, where it's only about money, my postulate admittedly breaks down.