Conclusion: "The administration should loosen all the restrictions that it has imposed above and beyond what Congress has required, and Congress should overhaul the system to open legal immigration for any person willing to work to contribute to the success of the United States." In other words, we should "promptly admit a majority of the 158 million who told Gallup that they would want to come," according to the 201…
A quick search came up with this [1], but they've written a lot more.
You don't have to agree with them, but I'm just saying that they actually have done a fair bit of work in this field and they have given some amount of justification to why they hold these views.
[1] https://www.cato.org/testimony/unlocking-americas-potential-...