I agree that there are many companies that hire H-1B (and other non-immigrant visa holders) over equally qualified US citizens and permanent residents in order

I agree that there are many companies that hire H-1B (and other non-immigrant visa holders) over equally qualified US citizens and permanent residents in order to pay less, work them harder, etc. But, I often see this presented as all or nearly all that is going on. There are lots of non-immigrant visa holders who get hired who are better qualified then 90+% of others, and are getting the same pay and conditions and their American teammates. These people are improving the employment prospects for Americans, not hurting them.