I'm sure there are pluses and minuses for both options but what works in one place won't necessarily work the same in another. It can be a boon for the areas people are migrating to but you can easily get gentrification instead.

Different parts of US, Australia, or Europe will respond differently even when subjected to the same policy. So I don't think any one answer is correct as a general rule. But I am afraid in some places some will try to blindly replicate success stories from other places, with dire consequences.