How would you suggest they fix the process? The practice of hiring someone "because it is harder for them to switch jobs" so the company "can lock these employ

How would you suggest they fix the process? The practice of hiring someone "because it is harder for them to switch jobs" so the company "can lock these employees for longer" and "can pay them less" sounds like unlawful wage discrimination. If the existence of a governmental program helps a company in pursuing an unlawful practice should that be relevant in determining the wrongfulness of the practice? That seems like a very weak argument. It seems reasonable that a company should see the program as intended to make H1-B candidates attractive because of their skills, not because it will be "harder for them to switch jobs" and the company can "lock" them for longer and "pay them less". If there are citizens or permanent residents that have the same skills then what legitimate reason exists why companies should be filling them with H1-B candidates instead?