Then they would leave. The benefit they get outweighs the drawbacks for the people who work there.
Which is always true of miserable situations that nobody sane would mistake for "opportunity".
An unregulated corporate class can always arrange things so that the penalties for not working for them are severe enough to drive most people in the door. And that situation - corporations escaping government regulation, allowed a free hand in setting up everyone's lives for their benefit - is very common, especially in the US compared with other First World countries.
That's why it's so bizarre to see someone defend their careless assertion that the US provides more opportunities for its citizens than other countries by posting a list of employers, claiming that people with jobs obviously have more opportunity than those without jobs, and so forth.
Jobs provide opportunity belongs in the same category of contention that "Work makes one free" is in.
Which is just the standard defense of the political stagnation and New Deal rollback so familiar to Americans since 1980,
but with the recent development that this underlying presumption of American superiority involved - most opportunity, best health care, higher standard of living, etc etc - is now killing lots of Americans who do not belong to the designated victim demographic groups.
It's not that Republican governance suddenly became corrupt and incompetent in 2019. It's still the shameless Reagan standard clusterfuck of contractor fraud and influence peddling.
It's that an unusual amount of the cost of that corruption and incompetence suddenly fell on rich white men. Not their share according to their responsibility and benefits, of course - nothing silly like that; the dead and the bankrupt and the scarred for life are going to be predominantly from the standard supply, likewise the profiteers and beneficiaries of crisis - but nevertheless a significant share.
Viruses are not only bad for business, but they actually kill rich people sometimes - and cripple them, hurt them, scare them, put them under nightmarish medical care regimens, etc. Meanwhile they are making disconcerting discoveries about their ability to do anything about it: that bs about the deep State? They'd repeated it so often they'd come to believe it themselves - and in the back of their minds they were counting on that State to take over in emergencies. Come to find out it isn't there - when Trump dismantled the shallow State of functioning agencies that Obama's administration had partly recreated from the debris left them by W&Cheney, he dismantled all the government there was.
It's like when the decadent aristocracy that's been embezzling from the military budget for decades suddenly finds itself facing an actual military assault from a real enemy - they don't know what to do. And the virus isn't cutting them any slack.