Ecomonic conditions are in a constant state of flux. Requireing all American employers to comply with the law is going to raise labor costs in some industries. That's simply a fact. Smart employers will deal with it sooner rather than later.
I will go as far to say is I hope businessmen/fermaners/managers who hire illegals, and have basically causd the situation we have today experience very painful and expensive lessons in the next few years. It will be entertaining to see "people" such as these howl in pain and go bankrupt.