If you're talking to workers from another company, they're going to be bound by what I can only call "loyalty" to not tell you why it happened (what are they go

If you're talking to workers from another company, they're going to be bound by what I can only call "loyalty" to not tell you why it happened (what are they going to say, "we think our boss is dumb and he made us do this?") and instead will make up reasons, doubling down on it and starting an argument where one side has a duty to be disingenuous. It's a mess, don't start it.