For several days, the Los Angeles Times has been running an excellent series on the exploitation of farm workers in Mexico. Here is a bit of information on how the people who grow the produce you buy at Walmart are treated.
The Way We Live Now: grumbling unnecessarily over pennies. It's just human nature. It matters not how righteous the cause may be; it matters only that the cause will cost us money, which is unacceptable. Do farmworkers need another penny?