> and then they bolt after they finished training and get enough experience There are contract forms to mitigate this. Usually with opt-out payment clauses. So

> and then they bolt after they finished training and get enough experience There are contract forms to mitigate this. Usually with opt-out payment clauses. Someone can pay those and you lose your investment in the person but not the money invested. Where I live the defense industry does this for engineering hires, 2 to 4 years training, minimal service period of 4 to 6 years afterwards. Opting out basically costs you your education tuition, but not your salary. The same thing for C(+E) drivers licenses and affiliated stuff (heavy trucks and loading permits).