> If that's what you wanted to achieve then you'd be best off not having any visa system. So obviously this is not what they're optimising for.

If you want to change an existing system, slice the salami thinly.

Whether they intend it or not they are optimizing for moving a lot of work overseas. They seem to think the economy is the same as in 1945. And even to get to 1945 the US imported a ton of nuclear physicists and other scientists.