Force everyone into the i9 system. Prosecute people for SSN fraud.
But if Ivan comes to work with a green card, how will we know if his family is here illegally if they don’t work?
If their applying for food stamps, or trying to enroll in public schools, or trying to get free medical care in ERs gets them immediately arrested and deported, then we can get rid of them.
If Ivan is working and supporting his family to the degree that they are not consuming tax dollars, then I don't care if they are here illegally. I start caring when they consume my tax dollars, instead of paying taxes.