In what sense is it "nothing like that"? France is quite socialist politically, as a poor kid you can aspire to obtain free and good quality education, get some help from the state if you are in poverty while relying on free health care.

What do you think bloc countries and Soviet union were? Some kind of communist utopias? They appear to "didn't have dire poverty" because "social parasitism"[0] was a criminal offense for a long time. Like, police (sorry, "militia"!) could stop you on the street during work hours and arrest you if you didn't have a document from your boss or from a doctor allowing you to skip work. In later times "undesirables" were just forcibly relocated from "nicer" places [1]. Unfortunately description of these in English are quite lacking, but as a person born in USSR I can assure you that all the nostalgia for that times is either coming from old people who actually just nostalgic for their youth (old joke on the subject: - Gradpa, why are you keep saying it was much better under Stalin? - Because I could still get an erection back then!), or intentional political propaganda.

[0]: https://en.wikipedia.org/wiki/Social_parasitism_(offense)

[1]: https://en.wikipedia.org/wiki/101st_kilometre