Check out (if you haven't already) the excellent docu "East Side Story," which is packed with clips from Eastern European musicals made during the Cold War. Everything from Soviet peasants singing praise to Comrade Stalin while helping to build real existing socialism in the factories and fields, to late-60s hip East German and Romanian Elvis-style numbers where teens in tight trousers dance to the commie beat. Schlock is popular the world over, regardless of social system.
DP