The company forced them to train their replacements
Bullshit. They BRIBED them to train their replacements by giving them a severance payment if they do so. There is a difference. How could "forcing" them possibly work?
You have to train some new people who are going to replace you.
Bullshit. You're firing me anyway; I refuse.
[Idiot employer stammers uselessly]
But the bribe works just fine.
You have to train some new people who are going to replace you - and if you do, you will get a severance payment; otherwise nothing.
When my employer laid me off, I didn't have to train my replacement, but they did get me to sign an agreement not to do/say certain things after separation, for a period of time.