Robert Michels

“The government [...] cannot be anything other than the organization of a minority. It is the aim of this minority to impose upon the rest of society a 'legal order', which is the outcome of the exigencies of dominion and of the exploitation of the mass of helots effected by the ruling minority, and can never be truly representative of the majority.”
― Robert Michels

“Organization implies a tendency to oligarchy. In every organization, whether it be a political party, a professional union, or any other association of any kind, the aristocratic tendency manifests itself very clearly. As a result of organization, every party or professional union becomes divided into a minority of directors and a majority of directed.”
― Robert Michels, Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy