I'm not wrong. You're wrong. There are not 600,000 illegal aliens employed as farmworkers in California. That is a preposterous and uncited/unsupported allegation by you and the Center For Farmworker Families (assuming "undocumented" means "illegal").
If any California agri-businesses were paying 600,000 illegal aliens we would know all about it from endless media reports and from state and federal law enforcement reports and indictments, supported by whistleblower testimony, witness statements, plea bargains and thousands of other documents (emails, ATM transactions, notes, fake I-9s, fake E-Verify reports, fake shareholder reports, fake distributions, fakes IDs, etc.). It's impossible to run a criminal conspiracy that large with that many actors/co-conspirators and that many moving parts without getting busted. And the intense ire of the citizens of the state of California would be upon them demanding reparations.
Try it. Try hiring even one illegal alien at your job -- even just the beginning new-hire steps -- and report back here what happens. Just try sticking a fake I-9 in a file and see what happens. Or try just hiring one illegal for one month totally off the books. Just try finding the cash for one month of wages for one guy without committing at least one felony falsification of business records (a/k/a Trump's law).
And you still haven't set forth your theory on what happened to white people that suddenly made them all lazy and slothful like.