>I find this hard to believe.
You don't have to "believe it". Just buy and read a few historical accounts, and/or biographies of people that lived through those regimes.
In wasn't that a job in "communistic days" was different from a modern job, it was that in those days productivity wasn't that high anyway neither was purchasing power, so there was little use for jobs to make things or offer services that people couldn't afford.
All the same, everybody was supposed to automatically have a job, hence the creation of tons of mostly idle bureaucratic job positions.