Interesting topic that I recently became aware of. This certainly makes sense with all the recruiting that is taking place. Realization is that it costs a lot of money developing people and when the good ones leave, it takes a lot of training. I can predict that XOM will probably be spending a lot of money training new employees but not allowing experienced employees the same due to "budget constraints and need based training".
https://www.talentmgt.com/articles/2022/12/13/labor-hoarding-does-not-mean-job-security/