Employers are one of the chief magnets for illegals. I have sympathy for them in not being able to run SSN's through a database to find out who's legal, and who's not, but the same system should be mandated for any other magnet, such as schools, hospitals, etc.
Cut off the gravy train, and the illegals have no incentive to stay. The wall is a fundamental part of the solution to the problem, but so are measures designed to eliminate the illegals that are already here.
If they can not buy food they will leave.
I think putting the burden on Employers is just NIMBY thinking, put the burden on the other guy, type of thinking.
If one person is going to be jailed for trading with illegals, then everyone who commits commerce with them should be jailed.