More like Communism. ]
No, Communism always devolves into Fuedalism with the Party Elite ruling over everyone like kings and queens and dukes and earls.
They may call it communism, but it is very much a Feudal system with Communist makeup.
No, that would be an oligarchy or plutarchy.
The two modern classics on feudalism are The History of Feudalism by David Herlihy (Jun 1979) and Fiefs and Vassals: The Medieval Evidence Reinterpreted by Susan Reynolds (Jun 20, 1996). You might want to take a look at those.