This is Keynes term for the rule of all by an elite. It was to be undemocratic, since the people simply were not as clever as he and his, and did not know what was good for them. They possessed, to use an overtly Marxist word, “false consciousnes”, which is codespeak to say they had not yet been indoctrinated sufficiently as to be reliable.
Here is my own definition of Salariat: that class which makes rules for OTHER people. They retain another set for themselves. By that standard, Congress is already half there.