A 'Yes man' is a dangerous man. He is a menace. He will go very far. He can become a minister, a secretary or a Field Marshall but he can never become a leader nor, ever be respected. He will be used by his superiors, disliked by his colleagues and despised by his subordinates. So discard the 'Yes man'.

His lecture on leadership quoted in "Field Marshal KM Kariappa Memorial Lectures, 1995-2000", page=28