It begs the question to just assume there is a "feudal society" that needs to be "run". For instance, why not have a "first citizen" who is selected to manage internal coordination and external strategy, but must live in the worst house in the village and wear a hair shirt.
You can say, well that wouldn't work! But now the idea is that the structure of this model feudal society is justified by reasons like "people won't follow someone if they don't have a gold hat and a scary sword" and not by any process that led to selecting the particular feudal lord.
This analysis is incomplete. Assume I am the best (objectively) at "managing internal coordination and external strategy" but I don't want to live in the worst house and I am allergic to hair shirts. Then I won't sign up for the job and the society is worse off for it.
You can say, well that wouldn't work! But now the idea is that the structure of this model feudal society is justified by reasons like "people won't follow someone if they don't have a gold hat and a scary sword" and not by any process that led to selecting the particular feudal lord.