My anecodatal experience is they don't because I had friends in South Africa, DRC, and Nigeria who came from more privileged middle class backgrounds and still struggled due to a lack of education. They were never recruited by tech firms due to the issues the author faced. One asked me to refer them into some of the firms here but I was unable to get them in.

I don't know if it would have been cheaper to recruit them but I do know they had no chance here in America. They have hustled their way to a living but have worked 10x harder than me because I have an American citizenship and degree.