The whole idea is that Krsna wants Arjuna to become an ideal person, so that ordinary men can follow. And generally the practice is also the same. A leader of the man, if he is ideal, the followers also become ideal. And if the leader of the society or country is not an ideal man, then the followers or the countrymen or the members of the society, they are also of the same type.
Lecture on Bhagavad-gita 3.21-25, New York, 30 May, 1966