I hear you Thump, but there are no studies by any reputable economist (that I am aware of anyway) that support your "I disagree". Hell, if there were no economic consequences to shipping every
illegal alien home, then there would be a bill saying that passed years ago.
One of the big problems is that the illegal immigrants are paying taxes to the Federal government, yet the taxes paid to local and state governments do not
compensate the states and cities for the services used by illegals. OTOH, many illegals pay federal taxes, and wind up paying for services that they do not use for fear of discovery of their illegal status. And, certain industries like agriculture require large numbers of employees willing to work for low wages in poor working conditions. The illegals fit that bill. Your answer, let the "welfare trash" do the work does not answer the how we get people without transportation of housing to move from where they live to the various localities where the migrant laborers work ( they move a bunch, see the fact they are called "migrants"), house them, see to it that their kids are watched or in school, let alone account for the many actually disabled people that get federal support due to their physical disabilities. Having these people work in the sun for 12 hours picking veggies or fruit is not a plan.
We need to find a way to allow illegals to work here, to account for their actions while here, to make sure that they are taxed, and that their money is not only collected by the feds, but that the fed pays its fair share to the states and cities for the financial burden of illegals using local facilities, be it health, police, etc, all to the benefit of the feds.
SSRN-Taxing Undocumented Immigrants: Separate, Unequal and Without Representation by Francine Lipman