Most illegal immigration (US anyway) are people that overstay legally obtained non-immigrant visas. Thus, the main reason it is difficult for people from some

Most illegal immigration (US anyway) are people that overstay legally obtained non-immigrant visas. Thus, the main reason it is difficult for people from some poor countries to get non-immigrant visas to rich countries, is that the rich countries want reasonable assurances that the applicant intends to return home rather than overstay the visa. https://www.theatlantic.com/international/archive/2019/04/real-immigration-crisis-people-overstaying-their-visas/587485/ https://www.theatlantic.com/international/archive/2019/04/re...