I'm sorry, but you don't have a clue what you're writing about. There is a whole segment of our population that can live a substandard life and never get off the porch because the government will take care of their meager wants. Until that changes, there will be immigrants taking lower wage jobs.
In MY area, there are way too many people existing on the dole, and they see no reason to work. If the phony disability payments, food stamps and welfare payments stopped tomorrow, I could find people to work for a good and honest wage.
You keep telling yourself that to avoid facing the fact your market has changed and you don't want to change with it.
Pointing to a few slackers does not justify the HUGE demand for illegal workers.
And furthermore, have you tried to see what life would be like for one of your "well paid" workers by doing a standard budget for their income level?
It's simply asinine to expect any half-way cognizant individual to give up 25k of benefits from the government for 15k of wages that still will not satisfy that person's financial responsibilities.