I have one direct report who acts as though, when it comes to compensation, it's "never enough". After a six-month revealed they were looking for more (again), I was able to negotiate a modest second increase in the same year but they are really approaching the top of the pay scale now.
When we met to review the increase, body language was negative and the verbal reaction was that they were expecting more. Since then things have continued as normal however the general attitude of this person is as if they think they are doing the company a favor by showing up to work. This was also apparent before this last increase. I have never seen them happy with any increase in compensation.
Complicating matters, their work is of high quality and has steadily improved during their employment even with layering of new tasks. In this industry it is not difficult to find people and although replacing this individual would be challenging it's not an impossible task. Is this just a personality quirk I have to live with until they either figure out that their situation is not so bad or finally leave to see if the grass is greener elsewhere? (BTW this person has no personal situations that make money tight, in fact it seems quite the opposite)