As well as a shared mentality, the Establishment is cemented by financial links and a 'revolving door' culture: that is, powerful individuals gliding between the political, corporate and media worlds - or who manage to inhabit these various worlds at the same time. The terms of political debate are in large part dictated by a media controlled by a small number of exceptionally rich owners, while think tanks and political parties are funded by wealthy individuals and corporate interests.
Owen   Jones, The Establishment: And How They Get Away with It
corruption, politics, the-establishment