Please cite the source for this figure. Why in your opinion are employer sanctions ineffectual (aside from your assertion that they "will never pass congress")?
What exactly is your position? What combination of methods do you favor for securing the border and reducing the population of illegals? Or is that even the goal as far as you're concerned?
"Why are employer sanctions ineffectual?"
Any regulation that is based on "throwing their ass in jail" for not doing what is clearly the responsibility of the feds is bad government. With every quarterly report, employers furnish the feds with an updated list of every bogus SS # being used by the illegals. There is no need to force employers to enforce the law. Let the feds create a enforcement division to detect these bogus ss# that responds with a letter to the employer to fire the employee using that number. If the employee doesn't like it, he can plead his case to the feds. We could even put Lord Sensenbrenner and his Joker Tancredo in charge of such a program. Maybe you want the job? You got plenty of lawyers to back you up?
Any immigration reform that doesn't realistically address the labor supply and/or relies solely on enforcement is destined for failure. Had congress been doing this thru the years by allowing the quotas on legal immigration and guest workers to rise and fall with the changing economic conditions, there would be no, or few, illegals present in this country. But they didn't.