This hits the nail in the head.

I have a friend who grew up in the USSR. From what she’s told me, the social pressure around pulling your weight can’t be overstated.

For example, her school uniform had a scarf, and the punishment for most offences (being late, not doing homework etc) was to have your scarf taken away for a day or two. Instead of being trapped in detention away from everyone after school, you had to spend the day publicly marked out as someone who’s let the side down. You’d spend the day subjected to disapproving looks, and then when you got home have to explain to your parents why you had your scarf taken away.