In Western capitalist context, An apple employee can't do that because they would be stealing from Apple. If they are reselling phones that belong to them, they can dispose of them however they like.
I think the Soviet context is key. Because the state is rationing these items, it creates a black market based on personal connections. In Western society nobody cares because (ideally) the market is competitive and you can just buy from someone else.
Yes, an Apple employee doing that would be stealing from Apple. But in the capitalist context, we also have entirely legal business models that I would argue are equivalent to corruption ethically. A business that chooses to sell its products or services only to a select group of customers (entirely legal) and then picks those customers not exclusively based on their finances but based on what else they can provide. Such as access to certain people, different favors, etc. That is IMO ethically questionable.
But the Soviet everyday corruption variety of retail employees reserving cheese for someone who can return favors, that particular thing is particular to a socialist economy with a scarcity of relatively basic goods.