That is a load of crap. They can get people to do the work, they just have to pay them what an American is worth, not what a peasant is worth.
Not only pay farm laborers proper wages but let them also own farms. If a farm is too big to be picked or milked, let the workers achieve ownership also.
That is what Milton Friedman said.
“..They can get people to do the work...”
It’s not about work.
It’s about importing a ready-made revolutionary peasant army with hardcore jihadis thrown in to raise hell on command.