Exploitation is not a sustainable business model.
One question, what will happen when they are made LEGAL?
A: They will want more money and better treatment. That will cost more money. Will they bring in new ILLEGALS to compeate with the newly made LEGAL immigrants?
This is not a GUEST WORKER program it is a GUEST VOTER program.
"One question, what will happen when they are made LEGAL?"
They join unions, or so the unions hope. They will pay union dues and and the unions will use that money to back Dem candidates. Their wages will go up significanly and and once-percieved benefits by business to employ illegals will disappear. Some other cheaper labor source will eventually come along and put them out of work and on to the dole, which will be possible because union-backed Democrats will be in office handing out all our tax-money.
That's just my vision, though.