<< Scare off the employers and you cut off a main attraction for illegals to want to come here or stay here.
As G. Gordon Liddy calls it: "the electromagent of jobs" that draws [Criminal aliens] into the country >>
On this one Mr Liddy is so far off the mark as to be effectively not even hearing let alone answering the question.
The criminal alien invasion is incited, organized, aided, abetted and facilitated, for the purpose of disposessing Americans of ownership of either our country or its government, by the United States feral gummint. Specifically by the activist "Democrats" who comprise more than 90% of the permanent bureaucracy.
Most of the "farm work" done by criminal aliens is directly subsidised, at the cost, annually, of Scores of Billions of Dollars, by the feral gummint and produces the humungous mountains of unwanted and unsaleable agricultural produce of every description that bankrupts friendly nation's farmers and by being dumped by USAID and other redundant agencies has completely wiped several previously net-exporting agrarian countries, Somalia, for example, out of existence.
Most of us, every darned day, meet at least one of the incompetent former workers in a wide variety of low-demand fields who've been displaced by criminal aliens. They now pick up checks for attending at make-work positions created for them by the Post Office, INS/ICE -- or at the DMV.
And the unemployment rate among work-seeking American youth is far in excess of 50%. Criminal aliens have been used to deprive several generations of America's youth of first, after school, part-time and/or college-supporting jobs.