I think it was a fair characterization, if only because employers know that H1-B visaholders are desperate to not be deported (i.e. must maintain employment/sponsorship).

Wages are kept suppressed, keeping people (citizens and not) desperate.

The people that have (e.g.) immigrated into America, but not naturalized yet, are in extremely perilous positions, beholden to a corporate entity which would rather employ them (for wayyyyy less salary) than cater to free-er citizens.

¢¢