You are part of the system, so if the guy that gave you the job (and may fire you as easily) asks you to "make it so that the population is X millions" of course you do it.
I was thinking more to a "I am grateful to my father's cousin for giving me a comfy job where I don't have to do much of the day, of course I am going to return a favor" kind of situation. Of course it is not always this way, but it is fairly frequent.
This is in particular true for those countries whose borders where designed not around ethnic lines but arbitrarily by external forces. The loyalty is to the clan, not to the state.