Technology is dominated by two types of people: those who understand what they do not manage and those who manage what they do not understand

--- Putt's Law, from Putt's Law and the Successful Technocrat (1981)

The book apparently also draws Putt's Corollary, "Every technical hierarchy, in time, develops a competence inversion." The wikipedia entry glosses this as incompetence being "flushed out of the lower levels" of a technocratic hierarchy, ensuring that technically competent people remain directly in charge of the actual technology while those without technical competence move into management.