As a manger myself, I try to be careful about what I ask for this reason. I can easily ask a lot from a team member, but I often don't have the ability to really reward them beyond a set limit. If I'm not in a position to adequately reward them for that extra effort then I'm not going to ask for it.

Our position straddles the fence. We have to support the company and our team members. Ideally we do that by keeping incentives and compensation aligned. But corporations are usually structured to have a predictable limit on the ways we can compensate employees, but rarely any limits on what we can expect from employees. We should be careful there to be fair.