Sure. But I don't think this is a sufficient defense — at the extremes, cultural norms can result in horrific things even though individual actors may not be motivated by malice.
> By the way, it's also a cultural norm in the US to complain about the lack of generosity among those richer than you, and yet spend almost 100% of your salary helping yourself, when you could just as easily spend it on those less fortunate.
There's definitely an incongruity between people's expectations of those above them and what they contribute themselves. We should all give more! But even if I were to donate 100% of my salary, it would barely dent things for those 500 employees.
When we complain about people above us, we're (usually) not chastising individuals but calling for systemic solutions to these issues. The overarching goal isn't for people to donate more of their resources, but to structure things in a more equitable way so that people don't rely on individual generosity in the first place.