"Tolstoy, personally I reject the stereotype that immigrants come here to get on welfare programs. "
As do I. I live in California as well, and have known migrantes all my life; many of them (or more often, their children) are my friends. From my experience they all come here to work because there are no opportunities for them in their home country.
But what happens when a migrant laborer picking apples off a tree in an orchard or building the roof on a new house falls off the ladder and breaks his leg? He's been making about $50-$70/day and has no money to pay for the thosuands of dollars in medical care he needs. So who foots the bill? I know big businesses have a number of legal 'outs' to escape the workers' comp system for these kinds of things, so it's not the employer. It's the taxpayer - either directly, through MediCal, or indirectly through higher hospital costs charged on the shrinking population that still has health insurance or can afford to pay for their hospital visits (need I point to the dozens of hospitals in Southern California that have gone out of business due to unreimbursed emergency room visits by immigrants and poor citizens who can't afford to pay?).
What if the immigrant has a child while working in California? POOF! free (to the parent) food, health care, education, child care, housing subsidies, etc., etc. for 18 years, paid for by California taxpayers, since a migrant farmworker or construction worker making $50/day really can't afford to pay for any of it. That's a cost of hundreds of thousands of dollars per child. Who pays? We do.
None of the immigrants I've known have come to this country for the lavish welfare benefits. But I've known few who didn't take advantage of them when they were needed and available.