I take your point. In fact, I would guess that the entire El Salvadoran economy (though not the Mexican one) runs without any significant illegal workforce, to offer another example to support your argument.

However, a lot of industries will be significantly hurt, if we were to shut it off. California will take a big hit for sure. And so will the country since we go a long way towards feeding the entire country.

I just noticed something. You have put a lot of effort into saying how this or that business tax or employee protection law or environmental protection law would "ruin the economy". It's funny how you reverse your position in this case to claim that it is no big deal for employers who will have to pay more for their labor if we get rid of all the illegals.