In what way are these Indian students trying to cheat the system?
Seems like the issue is that the rules are in the process of being changed (or are changed?) after these students spent however many years going to to school before the rules changed.
Work in these job sectors? You’re valuable (until the next rule change that will retroactively label you as “disposable labor”).
Work in those job sectors? You’re disposable labor whose use is no longer needed, here’s your deportation papers (until the next rule change that will retroactively label you as “valued labor”).