power structure
From Longman Dictionary of Contemporary Englishpower structureˈpower ˌstructure noun [countable] the way in which the group of people who control a country, society, or organization are organized There have been significant changes in the power structure of the company.Examples from the Corpuspower structure• He's established a power structure inside the Washington power structure.• But the boxing power structure is white and it's going to be a slow change.• The point is self-subversion, overthrowing the power structure in your own head.