In that case, I would think the company should also show that an equivalent job is offered to non-visa worker with a similar pay. Without that, such rule would not be sustainable.
That's already supposed to be the case, but the problem is that it is ridiculously easy to abuse as companies will just do stuff like low-balling salaries and putting really specific requirements on the job posting. Instead, we really need to be giving visas to *people* and not *corporations* since this whole program is predicated on the idea that certain industries have shortages of skilled workers.