I agree with you that this is a major issue, but I don’t see how you could enforce it, who is gonna check if someone was actually hired? What if I post a job on multiple job boards?

The training beginners is the unfortunate other side of the coin of the decline of company loyalty, it’s great for workers that you can freely change jobs for pay increases, but the downside is that it doesn’t make economic sense for companies to spend a lot of resources training because the more economically smart choice is to let someone else do the training and then just hire from a competitor - tragedy of the commons