I think most Americans agree that it is the black market employers of "undocumented" workers which helps create the economic pressures on foreign citizens to illegally immigrate to the United States so that they can try to better themselves, and because these "undocumented" workers are willing to work under worse conditions and for less pay this in turn drives American wages down. We already have laws against the hiring of "undocumented" workers, but a huge problem with these laws is that they simply are not enforced.
There is a solution to this problem, albeit, given the history of the solution, a potentially very ugly one. America has faced the problem of its laws not getting enforced before, and come up with an incentive program that was an instant success. It's called...
asset forfeiture.
Essentially how asset forfeiture works is that if property is used in order to facilitate the commission of a crime, then it may be immediately seized by law enforcement and auctioned off. The proceeds then get divided up between local law enforcement, and whatever other local, state or federal political or judicial authority manages to get their fingers lawfully placed in the till. The hundreds of millions of dollars raised annually from the so-called "War On Drugs" has bought a lot of really primo new squad cars, and for-right-or-wrong has ensured that drug laws remain an enforcement priority.
If asset forfeiture were used with the problem of black market employers, the way it would work is this: hire illegal workers to do landscaping, your landscaping business now belongs to the local police department, to be auctioned off to buy a fancy new dispatch system; hire illegal workers to pick pears, your pear orchard now belongs to the local police department, to be auctioned off to buy a set of tripped-out Hummer police cars;
hire illegal workers to clean rooms in your hotel, your hotel now belongs to the local police department, to be auctioned off to buy the gasoline costs for those new Hummers; hire an illegal worker to be a nanny to your children, your home now belongs to the local police department, to be auctioned off to buy an innovative "green room" where police can get daily massages or something.
Back to the ugliness I mentioned earlier for a moment, in the so-called "War On Drugs," asset forfeiture has been widely abused, by using civil rather than criminal laws. The difference between the two is the burden of proof, and with civil law, only probable cause or a preponderance of evidence is needed in order to find guilt, and this in turn puts an unreasonable burden on the property owner to prove that they are innocent. No reason to make the same mistakes again here, so in order to seize property, the government should have to produce clear and convincing evidence in a criminal case that the business property was "guilty" of facilitating the hiring of illegal workers.
Police are not the smartest professionals, but they know where their bread is buttered. Were this tool to be put into play, they would use it without compassion, and the hysterical news media alone would provide enough advertising to quickly end the practice of hiring "undocumented" workers. And it's been estimated that there are twelve million illegally-immigrated workers in the United States right now--just imagine what might happen if instead of being economically exploited here, these people went back to their home countries all at once and demanded and worked to bring about the changes that their home countries desperately need, using the same force of will it took for them to come here.