I can definitely understand why not getting enough praise or recognition might cause someone to leave their job. Human beings naturally want to feel appreciated for what they do. When you spend a lot of effort and time doing something, it is natural to want to be recognized for it. While you may not be recognized for every single thing you do, a pattern of non recognition is sure to demotivate someone and fail to find any satisfaction or meaning in the work they are doing and in the place they work in. I have heard from co-workers who have worked in other companies about how they eventually got tired of only being demanded of more and more and not getting any recognition for the work they are doing and understanding of the pressure they are sometimes under. From the same co-workers I was told a story of someone who at one point got so fed up with this that he got up, left the work place and never came back. Now this is a more dramatic example, but the core of it is not far from what people desire: We want to be recognized for the work we put in.