Sometimes I wonder if anything will ever seriously be done about this problem. We've got to go after the employers, it's the only real solution, that's why employer sanction laws were passed in 1986.
That's only one variable in the equation. Many of the employers are... shall we say not engaged in wholely upright businesses. The areas between the ports of entry have to be sealed tight, yet those who want to follow the rules need a means to come in legally.