And another thing! It's so easy to get fake documents. You can go downtown to the center of the Hispanic district and right there in the open are shops advertising "work documents" and "immigration attorneys". It's very easy for a Mexican to come here on a tourist visa, hop off the plane legally, get fake papers and go to work and never worry about going back to Mexico when his tourist visa expires. If a contractor (halfheartedly) checks an applicant's status, he's confronted with fake documents and he feels covered--even if he knows he's breaking the law. The cops know it. ICE knows it. The politicians know it. It's right out in the open.
The same cop who will right a CITIZEN a speeding ticket or take you to the jail for shoplifting won't lift a finger to arrest anyone flagrantly breaking our immigration and labor laws nor the ones supplying them with forged documents.