Only around 2,500 people from India are allowed to get EB-2 and EB-3 green cards per year. That's ~200 Indians per month. This is a numerical limit imposed by Congress. The US government will approve an EB-2/EB-3 green card application, but not actually issue it, and place people from Indian on a queue. The queue for India-born people is over 300,000 right now. So the queue wait time is over a century.

These people from India are forced to spend their lives in the U.S. on the H-1B visa. A visa which prohibits spouses from working, deports your non-U.S.-born children[3] when they turn 21, makes it difficult to switch employers, prohibits unemployment / taking a break, and prohibits starting your own company.

This all goes back to the 1965 Immigration Act. That was the Act that made it possible for people from outside Western Europe to immigrate to the US. It allowed a limited number of highly-skilled people to immigrate if they were sponsored by a company (and the company proved there was no minimally qualified Americans willing to do the job).

Some rather-racist members of Congress were presciently concerned about a lot of skilled immigrant coming from China and India, which were the two most populous countries back in 1965 as well. To appease them, a 7% limit was put based on country of birth.[1] No more than 7% of immigrants in
a numerically-limited category can be from the same country of birth.

Again, when the 1965 law passed, there were hard numerical limits on immigration. To appease the racists, Congress reserved most of the green cards for family members. Even the majority employment-based green cards go to family members.[2]

Effectively, out of the 80,000 skilled immigraiton (EB-2 and EB-3) green cards, around 55% are used by family members. That leaves around 36,000 spots for skilled immigrants a year. With the 7% per-country limit, you end up with a limit of ~2500 per year per country.

[1] Specifically, Section 202(a)(2) of the Immigration Nationality Act (Sec 202 is codified as 8 U.S. Code § 1152 Numerical limitations on individual foreign states): https://www.law.cornell.edu/uscode/text/8/1152#a

[2] Family Members Use Most Employment-Based Green Cards (Cato Institute): https://www.cato.org/blog/family-members-use-most-employment...

[3] An extremely sad story about this: https://www.statesman.com/news/20171013/commentary-how-a-20-... Quoting:

> My wife and I came to the United States nearly 20 years ago from India with our daughter, Himani — legally — in hopes of a better life and an aspiration to succeed and contribute positively to American society. Unfortunately, due to immigration laws, she was unable to stay in the United States due to massive backlogs. This is a problem that affects thousands of immigrant children.

> She has lived in Williamson County following all the legal processes — but last year she aged out of the system, when she had turned 21 while we were still waiting for her permanent status. Under the current immigration system, a child can only stay on their parents’ visa as a dependent until he or she is an adult. We had been waiting in line for 20 years to get permanent residence but are now stuck in a massive backlog that is extremely disheartening.

> [...] This is all she knows and can call her “home.”

> Juvenile memories — such as her lemonade stands and attending prom her senior year — are some of the beautiful things she had to leave behind. We still cannot digest the reality of the situation. As a parent, it is bearable to see your child leave home voluntarily for college or their career — but not when they’re forced to leave through the result of unfair laws.

> She initially went back to India alone last year with a big smile and positive attitude. Since then, life has been a struggle to live for her: assimilating to a new culture, undergoing chronic illnesses due to her environment in India, and trying to figure out her life in general.

> She says it feels like someone has spontaneously taken everything away, including her identity. On top of that, her college education in the U.S. was abruptly stopped because she was unable to obtain a student visa; there is a law where gaps between a dependent visa and the college semester start date should not exceed 30 days. Unfortunately, she was five days over the limit. She has since applied to another university in India, where she will spend another four years studying.

> She hadn’t been able to see us for a year but later opted for a visa to “visit” a nation that is practically her home.