Perhaps. But in my city I see Hispanics doing things, running businesses, providing services that didn't exist a few months ago.
If what you say is true, that implies that businesses are purposefully breaking the law, which may be the case. In that instance, this GWB policy will rectify things somewhat at least, since workers may now register without fear of deprtation if they have a job (increasing the income tax base). Workers who have no job will still be subject to deportation.
Look at the heavy subsidies paid into cities, implicit & explicit
Are these employers providing health benefits, or just using the local emergency room? Are they getting enterprise zone tax breaks? Subsidized housing for extended families?
Just pointing out that it's not a level playing field.