Because we are always making comparisions.Are you aware of about why you are so gloomy & miserable in your life? If not than perhaps you might not be aware about of the fact that you are are consuming much of your time in doing comparisons all the times. These comparisons are in some aspects with your supervisors or with your subordinates or even with those you are unknown to that you began to find the gaps or shortages of something which may feel you are deprived of which could be again in terms of anything. The human tendencies for comparing the things are so much that even if the 99% that we are ahead with the others but that 1% would make you feel uncomfortable & than we are in a different world.
Well that's what being the human being is all about. So do you carry with the same phenomenon?