H1B is skill based?
H1B should be the supplementary to US workforce not replacement.
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Lottery based system
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Need employee to file the petition(s)
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Multiple H1B petitions for the same beneficiary
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Multiple H1B Petitions filed by Same Employer
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Multiple H1B Petitions filed by Different Employers
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Multiple H1B petitions for the same job
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Q: why company will hire low-skill employer and file H1B petition?​
A: Regular companies will not do. But outsourcing companies will do due to the business model to make profit.
Q: why outsourcing happens?
A: Company uses outsourcing to save cost. The latest example is Boeing S737 Max.
Q: outsourcing companies business model?
A: There are many great articles online: one, two
Q: who dominate outsourcing?
A: Indian companies. See 2018 data. Check out the list of top Indian IT companies. Information technology has increased its contribution to India's GDP from 1.2% in 1998 to 7.7% in 2017.

Skill analysis for Indian H1B
Since Indian outsourcing companies dominate H1B, let's do a deep dive here. I will use 2017 data here:
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COGNIZANT TECH SOLNS US CORP, total H1B 28,908 with 22,391 Bachelor
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TATA CONSULTANCY SVCS LTD, total H1B 14,697 with 11,766 Bachelor
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INFOSYS LTD, total H1B 13,408 with 10,130 Bachelor
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WIPRO LIMITED, total H1B 6,529 with 3,914 Bachelor
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Q: How is the education quality of Indian?
A: Indian universities out of top 300 in global rankings​
Q: International Olympiad in Informatics
A: Indian is not in the top 10 list.
Q: International Mathematical Olympiad
A: Indian has no notable achievements.
Q: IIT is good at IT?
A: Maybe not
Q: Indian has advantage of IT?
A: Will let reader do more research and judge. Read more and know about NASSCOM

Job replacement and discrimination
H1B is "stealing" American's job
H1B should be the supplementary to US workforce not replacement. But we do see more examples of such replacement even discrimination:
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Fairness for High Skilled Immigrants Act exposes Silicon Valley's hollow diversity slogans
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Lawsuit: Intel’s Indian Managers Discriminated Against Korea-Born American
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The US says Oracle is encouraging Indians to hire other Indians—and it’s killing diversity
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H-1B: Uber snatches up more foreign-worker visas as it lays off hundreds of employees
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In Charlotte, foreign workers replace Americans in tech roles
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How Indian IT Workers Discriminate Against Non-Indian Workers
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Census: Indian Visa Workers Driving Americans Out of Middle-Class Jobs
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Boeing’s 737 Max Software Outsourced to $9-an-Hour Engineers
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Workers paid $1.21 an hour to install Fremont tech company’s computers

Large scale fraud
There are many articles online for large scale H1B fraud, discrimination on hiring, etc.​
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How Outsourcing Companies Are Gaming the Visa System
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Hyderabad: H1B rules curb body shopping
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H-1B Employers Are Highly Unlikely to Appeal an H-1B Denial
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US accuses Infosys and TCS of cheating in H-1B lottery to unfairly corner lion's share of visas
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Inside visa fraud in India
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H-1B Visa denials at all-time high
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Tech CEO Pradyumna Samal convicted of large scale H1B fraud
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H-1B: Prison for visa fraud in case involving Bay Area workers
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H-1B visa fraud: Feds indict Sunnyvale man for bringing in 600 workers illegally
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US Says Indian Students Arrested In Visa Scam Were "Aware Of Their Crime"
