Even the morally bankrupt Big Government LBJ saw in 1965 that the Bracero program, which was an early guest worker program, was not doing us any good. So he canned it. The tomato growers and others complained that they would never be able to get tehir crops picked. Their crops got picked. Prices didn't skyrocket any more than otehr things did. But their successors make the same wrong arguments today.
And our tax dollars subsidize these farmers, who then produce a surplus, which our tax dollars then buy and throw in warehouses to rot. Do we really need so many farm workers?
Absolutely not.
As I've stated on this thread and others, these illegals are the scum of Mexico and among the most stupid you'll find. They are qualified to pick fruit and, as you point out, it's a make-work rathole.
The collective IQ of America is being watered down to room temperature by the posturing the politicians do to this gaggle that should be shoved back across the border.
It's socialist Mexico's problem. Mexico is crossing the border from socialist to communist and is a very real enemy of the United States.
The sorry state of affairs in this nation is a testament to the disgusting American political class.