Study: amnesty could shift agricultural workers to cities, decrease wages for Americans
Granting residency to undocumented immigrants in California could increase competition for low-end jobs as agricultural laborers shift to cities, while boosting tax revenues as other undocumented workers seek higher-paying positions previously denied to them, experts say.
...(After the 1986 amnesty), agricultural workers moved to areas cities such as Los Angeles, putting downward pressure on wages for low-end jobs, according to Julie Weise, an assistant professor of international studies at Cal State Long Beach.
"We could see something like that again," said Weise.
These are the points I've been making for over three years on the immigration wage floor page; see the link for the details.
It needs to be noted that any tax benefits from former illegal aliens getting better jobs would be offset by lowered taxes and increased costs due to many Americans seeing their wages fall, in addition to all the social costs of lowered wages for American workers.
Amnesty would worsen the income and wealth gaps, as many Americans saw their wages fall at the same time as the elites saw their wealth increase. The elites would pay less for labor and would profit in other ways too; for instance, see immigration banks.