Free market capitalist doesn't want the consumers of his employment opportunities to be able to shop around

JPMorgan talking about ethics ?

But speaking last year, Dimon countered: “You’re going to be facing ethical decisions like that. Think for yourself.

“How would you feel if you’re on the other side of that thing? Or do you want to be treated that way? Is it fair?”

Ohh poor little fucker likes capitalism when he's exploiting everyone but if the shoes on the other foot it makes him sad 😭😭😭

Threatening to fire people who already have their next gig confirmed is so fucking goofy.

So don’t mention it?

If you start a 'permanent role' with them, having already secured a next role, then it is unethical. That means you know, going in, that this is not effectively 'permanent'.

However. Having already started with them, if you find a better role, there is nothing unethical about taking that unless it contradicts an enforceable employment agreement. Maybe the role wasn't what you thought, or someone else has valued you more highly (in remuneration, working conditions or other benefits). It goes both ways and incentivising retention is up to the business - it's the flipside of lay-offs.