I have sat in enough calibration meetings to have watched this particular move more than once. A manager fights to keep one of his analysts off a transfer list. Another team wants her, and she is the strongest person he has, which is the whole reason he does not want to give her up. He frames it as protecting a critical delivery. What he is protecting is his own quarter, and he is skilled enough at his job to make the two sound like one sentence. She stays. Some months later she leaves the company altogether, for a title he could have handed her himself if letting her grow had ever counted for anything on his scorecard.

It took me longer than it should have to stop treating the manager as the problem. He is responding, sensibly, to what his company has chosen to reward. Everything it measures tells him to hold on to his people and hit his numbers, and it says nothing about whether the people under him are getting any better. Given that, keeping her is the correct move. The scoreboard confirms it every quarter.

What the exit interviews keep saying

Work Institute has spent about a decade asking people, on their way out, why they are leaving, and it has now built that research on more than a hundred thousand exit interviews. The largest share of voluntary departures traces back to career and development, the sense that there was nowhere left to grow, and it has outrun pay as a reason year after year.1 The firm sells retention consulting, so its framing carries a direction of interest, but the pattern is old and steady enough that I trust it. People do not often walk away from a job they are still getting better at.

The stubborn part is who sits closest to the problem. The person best placed to keep a high performer from leaving is her direct manager, the one who can hand her something she is not quite ready for or spend real capital arguing for her promotion. Work Institute names manager effectiveness among the things that shape whether people stay, alongside how clear a person's growth path is.1 And that same manager very often has the strongest reason of anyone to keep her exactly where she is.

The incentive nobody says out loud

No competent manager calls it hoarding. It arrives dressed as continuity and prudence, as a reasonable-sounding we cannot afford to lose her right now. Underneath the language the arithmetic is plain. A manager is graded on what her team delivers and on how many of her people stay. A strong performer who moves to another team lands in both columns as a loss, even when the move is a promotion she earned. So the play the scoreboard rewards, without anyone ever writing it down, is to keep the star close and the conversation about her future short.

A company can hit every manager's target and still lose the one person the whole operation was leaning on. The local wins add up to a loss at a level nobody is watching, and no dashboard is built to show it.

This is the old trap of tuning every part of a system on its own. Each manager, looking only at her own team, makes a defensible call. Keep the strong performer and protect the delivery. Stack a few hundred of those defensible calls together and you get a company where nobody with real ability can move, and where the quickest path to a bigger role runs out the front door and into a competitor's offer letter. Nobody decided to push the best people out. The company just rewarded a thousand small choices that added up to exactly that.

There is a structural version of this that I have written about before, how widening a manager's span of control leaves no hours to coach anyone at all. That problem is about capacity. This one is different, because it survives even when the manager has all the time in the world. Adding hours to her week would not touch it. The reward system would have to move first.

And the cost compounds. When a company finally does start moving its people around, it often finds a bench that was held too long and stretched too little, people arriving in bigger roles without the reps to survive them. The hoarding costs you the ones who leave, and it leaves the ones who stay underprepared for the jobs you will eventually need them to do.

What leaders can actually change

The people who can fix this sit above the managers, whatever a stern talk about developing talent might imply. It is the leaders who decide what a manager is measured on in the first place. The lever is the scoreboard. If a manager earns real credit when someone on her team is promoted away from her, if losing your best analyst to a larger role reads as an achievement instead of a hole in your plan, the incentive turns over. A manager who is rewarded for growing people out of her team starts hunting for reasons to say yes rather than reasons to wait, and the development conversation she used to avoid becomes the one that makes her look good.

So the question I would hand any executive team that calls itself serious about talent is a blunt one. Look hard at what you actually reward your managers for, and ask whether a manager in your company is better off developing her strongest person or keeping her in place. If the honest answer is keeping her, you already know where your next resignation is coming from. You just do not know the name yet, and for the moment, neither does she.