SOP
"The same system is occasionally abused by unscrupulous employers who use the leverage they have over the students to make them work long hours for low pay."
My only quibble with this is that occasionally should be replaced by usually.
It's Standard Operating Procedures for most software consulting shops. And it includes H1B as well as F1 visas. The visa holders are entirely beholden to the company, are under paid and over billed (justified by resumes massively inflating their experience).
Frankly, the "punishment" is an absurdly gentle slap (more of a tap) on the wrist.