Back in the late 1980s and early 1990s, it was not difficult for a skilled foreign worker to find good paying jobs in certain industries. If they were concentrated in certain industries, as I was, then the prevailing wage (and the 10% premium) went up even more.
Over time, this attracted more Japanese into the field and lessened the need for foreign workers.
It would be very interesting to see the magnitude of the reduction in H1-B’s if that policy were implemented here. But of course our legislative system is too corrupt for this change to occur.