James Kouzes and Barry Posner developed a survey (The Leadership Practices Inventory) that asked people which, of a list of common characteristics of leaders, were, in their experiences of being led by others, the seven top things they look for, admire and would willingly follow. And over twenty years, they managed ask this of seventy five thousand people.
The servant leader should rely "on persuasion, rather
than on one's positional authority, in making decisions within an organization."
The technique of convincing rather than coercion should be used.
A critical difference here is that serving people, for a servant, is an end in itself, not a way to achieve other goals. It should be noted that this critique of servant leadership is based on a total separation of leadership and management
The core of transactional leadership lies in the notion that the leader, who holds power and control over his or her employees or followers, provides incentives for followers to do what the leader wants.