As you suggest, leftists are true communists, basically losers that don’t want to work but want significant government benefits.
That’s incorrect. They are the useful idiots for the Communists.
All Communist countries had “Anti-Parasite” Laws, where people found not working could be arrested, or forced to take a job.
There was no “welfare” in Communist countries.
The American Leftists will take on menial tasks (state jobs) in exchange for benefits already on the table, which are significant.