For some firms, typically partnerships, it's actually a (unspoken) value proposition to the partners or higher-ups that the firms can attract and (to some extent retain) fresh talent while treating them very poorly. I'm thinking specifically of accounting, consulting, law, where big names (like big 4, mbb) ensure a steady stream of new people based on industry prestige. So there is no reason the firm has to treat them well, because there's always someone willing to take their job. It means leaders don't have to take employees into consideration when optimizing for output. And so becomes attractive as a leader (of a certain type) vs a small firm where you'd have to do people management and treat your subordinates with some respect.