This is sadly typical. There are plenty of people here in California who are fine with using illegal immigrant labor to save money getting crops picked or construction built, but if one of these laborers slices their hand open on piece of equipment and needs to go to the emergency room, then and only then does the hand-writing about "spending money on illegals" begin.
I have no patience for this sort of sadistic, extractive capitalism. Especially when it wraps itself in a faux mantle of concern about the law. If you don't want illegal immigrants in this country, then enforce the labor laws against the employers.
What's ironic of course is that most of the 14 California congresspeople who signed the letter represent districts who are heavily dependently upon illegal immigrant labor, and thus upon the very sort of lax enforcement of immigration laws that they claim to be against. At this point, I'd be more than happy to see ICE conduct a vigorous enforcement of immigration laws throughout the Central Valley. Perhaps staring in September?