The problem of illegal immigration should be handled first and foremost at the border.
As a second line of defense, employers who knowingly hire illegals should be heavily fined and the employees deported.
As for those who try to rip any laborer off, legal or illegal, and run, in effect, a slave-labor operation, they should be heavily fined and spend some time in jail.
There are no good actors here, from the US government on down.