There are stories about this most certainly. Hundreds no. The problem lies with congress and how the H-1b program is designed. What t
you describe is an employment agency that is headed by employees of big tech who treats Indian workers like shit. I don't believe they are headed by tech. If that were true and they were rewriting resumes they would be funneling substandard workers into their own companies. I don't believe it.

But there are agencies in India that hire employees and ready them for the H-1b visas. They vet their education and background. They pay them once they are on the job. For example: A bank may need 100 to do different types of programming. They pay a negotiated fee for the contract which of course is less than hiring American IT workers or there would be no benefit to hiring them. Its entirely possible the agency sets up their living conditions. I have no proof of that or the conditions under which they live.

Btw Indian programmers and mathematicians are among the best in the world.

I think it is unrational to trash companies. They have a lot to lose. 

✅ The ire should be directed to the Department of Labor who administers it, our congress who has done nothing to write meaningful immigration law for years and the lobbyists who pay/ members of congress $10k to sponsor a bill and then writes the bill for the congressperson. Yes lobbyist do this all of the time.

Don't believe everything you read or told. Research it be for you buy into. Ask hard questions. Google what Disney did to 250 of their IT workers in 2018 for shabby treatment by a shabby company.  Their workers were on Twitter telling us what was happening. It didn't effect us and they  were ignored. Bitching to each other doesn't fix the problem. Contact congress if its important to you. They are THE ONLY PEOPLE who can fix it.