Honestly this is a pretty naive view of management. The moral solution is to do what's best for the team. It's also not ethical to keep someone due to their demographics. If someone is performing well, you keep them if you can afford them (and reward them well!). If they're not doing good, you let them go. That's the same if the employee is 21 or 51. Game theory plays a huge role in successful operations. Even from a ethical perspective, it's bad to make everyone suffer (or lose their jobs) just to save one poorly performing person.
> The best managers are the ones who take underperformers and make them great.
In my experience (successfully managing a large amount of people) you can't really turn around underperformers in most cases and expending the energy to do so is harmful to the rest of the team. You should focus on your best employees and let the underperformers go asap. As an IC I also appreciate this strategy as I strive to be a top performer.
