There are those that say this isn't happening
As I become aware of the stories showing it is happening, I will post them here
Stories of H-1B Visa Abuse and other anti-American actions in the STEM industry
How Indian IT Workers Discriminate Against Non-Indian Workers
It didn’t happen overnight
Government Agencies Still Hiring H-1B Visa Employees for American Jobs
Don’t Bother Learning to Code
Lawsuit Alleges Anti-American Bias by Indian Managers in U.S. Workplaces

“What the companies are saying is that Americans are not good enough to staff the modern economy,” said Krikorian. “You have to admire that gall — they are arguing with a straight face that 25 percent of unemployment is not high enough for them to resort to hiring Americans.”

How Indian nepotism is changing the technology workplace - Must Read
Do H-1B Visas Help or Hurt American Workers?