The program has lately been used to find foreign workers when American workers are unwilling to work for the rate the company wants to pay (i.e. H1B workers are chronically underpaid).
Is this going to be retroactive, in a way? I.e. if you currently hold an H1B, are underpaid, and this becomes law, will your employer have to raise your wages or stop sponsoring you on next renewal? That would put a lot of visa holders in a very tight spot come next renewal.
"In many cases..."
And I'm many cases they don't, all my many friends who are H1B (except 2, which are paid at market) are severely underpaid, severely, and can do nothing about it.