These are simple, rudimentary facts.
If there is an endless supply of cheap labor-and no constraints placed upon employers to abide by basic labor standards or wage laws-then there will be no incentive to modernize, or find innovative solutions.
Australia-which imposed some of the most sensible restrictions on the very type of laborers that we are seeking to legalize by the millions-learned this lesson.
One which I should hope the United States would want to emulate.
Livestock doesn't require a lot of people since a few cowboy's can take care of a huge herd(etc.etc), it's not the labor intensive endeavor as picking fresh vegetables and produce.