It's less about savings and more about incentivizing the hiring of juniors in the first place. Many early career engineers find it much more difficult to get th

It's less about savings and more about incentivizing the hiring of juniors in the first place. Many early career engineers find it much more difficult to get that first job than the second one, because they are seen as a risk. If however you make it cheaper to take a risk, then firms will take more risks on net, and the end result will be more juniors being able to enter their careers sooner (and more junior figuring out quickly that such a career is not for them, which is also a good thing).