Your comment just shows how you, and all other reactionary Americans like you, just don't understand and appreciate how much these illegal undocumented workers have added to the U.S. economy over the years. /sarcasm
Just think how much less the legal documented U.S. worker's retirement would be if they hadn't been hired to re-do the work originally done by the illegals braceros.
It doesn't matter whether they think that I understand it or not. The rule of law is what creates the prosperity that millions of outsiders want. It all falls apart when they bust up the law so as not to apply. Benefits go bye bye.
Also, if US citizens started boycotts of companies employing unauthorized trespassers, there might be an impetus to change the way the work is done by using more machinery.