Pournelle's Iron Law of Bureaucracy[1] states that in any bureaucratic organization
  there will be two kinds of people:

  First, there will be those who are devoted to the goals of the organization.
  Examples are dedicated classroom teachers in an educational bureaucracy, many
  of the engineers and launch technicians and scientists at NASA, even some
  agricultural scientists and advisors in the former Soviet Union collective
  farming administration.

  Secondly, there will be those dedicated to the organization itself. Examples
  are many of the administrators in the education system, many professors of
  education, many teachers union officials, much of the NASA headquarters staff,
  etc.

  The Iron Law states that in every case the second group will gain and keep
  control of the organization. It will write the rules, and control promotions
  within the organization.

[1] https://en.wikipedia.org/wiki/Jerry_Pournelle#Pournelle's_ir...