The following is just a small sample of what your tacit approval of "undocumented workers" perpetuates:
More coyotes go into the people smuggling business
More abuses of illegal aliens on both sides of the border
The ongoing breakdown of the U.S. being a nation of laws
Cramming people into houses/apartments in violation of zoning laws
Giving slum lords more "customers"
Higher crime rates
People coming into this country with communicable diseases
The further overcrowding of our schools
The over-burdening our healthcare systems
More and more social services needed at the citizens' expense
Higher crimes rates
More and more identity fraud
Damage to the environment
More wear and tear on our infrastructure
More voter fraud
More new gang members
And the list goes on.