Correct, it helps the farms remain profitable. My wife is a winemaker and even with the guest worker program they are not able to find enough workers. The salaries have gone above $20/hr, though the way overtime works is different and requires a lot more than 40 hours of work (for now). Don't have the time to put together a well referenced document, but the inability to hire workers at what I feel is above the value of the work is a real problem.