Earlier quoted context omitted.
I'd argue they hide their takeaway because of what GP comment said — not because of anything innate, but because a staff member will not let them. I grew up in an Asian household of six. We definitely took food home at AYCE places. My parents definitely knew it wasn't OK, but they felt like they were gaming the system (like a dubious life hack of sorts) and saving money, so they were actually quite proud of it, bragg…
In the Eastern Bloc states, it used to be so common for workers to steal from the workplace that new moral norms were established around this; if you're not stealing from work, you're stealing from your own family! Goes to show just how fragile a high-trust society is. Theft and corruption can easily be normalized to such an extent that not participanting gets reframed as immoral.
If the factory is yours, then everything inside is yours ;)
But it's funny how low wages under the broken Soviet economic system turned such things into a semi-official, informal work perks, allowing people to make ends meet.