"Elites" and the "Establishment" are separate terms with different meanings - although can be combined in some contexts. Elites are people who "know better" than the masses and through their position of privilege or power, try to impose their ideology on others. You can count many university professors, the crowd that runs with owners and editors of the media, and the wealthy contributors to extreme activist organizations among the elite. They are a group that typically distorts the headlines in a manner that "shouts down" the genuine concerns of citizens (AKA populism). They view themselves as morally superior - yes, they know better. 
The Establishment on the other hand, are the Users. The behind-the-scenes collective that thrives off the largesse of government - lawyers, consultants, lobbyists, subsidy-driven businesses and the like. These Users are either directly or indirectly at the trough.

If you don't fall into one of those two categories - we're coming for them!