Exactly. That's why illegals are not there. They aren't needed. Illegals come to work, if there are no job openings in an area they don't go there.
Bayourod, if the illegals weren't in Houston or Phoenix or Chicago then just as in upstate NY the citizens would do the jobs as they always have. The illegals are driving down wages and benefits, that's why employers prefer them over Americans. You don't need a Master's degree to figure it out.