Have a friend who works at a local college. In several of the jobs (that pay minimum wage + 70 cents) they can’t get native born workers to take the jobs. So more and more of these jobs are being filled (where they can) with international students.
They can’t pay more per hour due to some law (maybe Federal), but students just don’t want to work at those jobs for those rates.
Then that's below the market wage for those jobs.
They can’t pay more per hour due to some law (maybe Federal)
If so, then that's what needs to change - not the number of work visas.