But wouldn't those artificial ceilings also prevent immigration applicants from having the "paperwork" to show their capability which is precisely what the Amer

But wouldn't those artificial ceilings also prevent immigration applicants from having the "paperwork" to show their capability which is precisely what the American immigration bureaucracy will look at? It's not like they're letting immigrants in based on an IQ test, they're letting people in because they have elite degrees, are admitted to American universities, or have American job offers. All of those are indicators of status already achieved rather than potential status which has been supressed by local conditions in their country of origin. In other words, immigrants coming in through the highly qualified routes are already high status in their countries of origin. Indians coming to the US on H1Bs for instance are overwhelmingly from high caste social groups and educated at the best Indian universities.