I think GP is saying that even in your own self-serving interest, you're better off sticking around longer once you reach more senior levels. Otherwise potentia

I think GP is saying that even in your own self-serving interest, you're better off sticking around longer once you reach more senior levels. Otherwise potential employers will hesitate to hire you for fear that you will leave after a short time. Even if you just want money, the long term consequences are worth considering.