"lot under-the-table"
That's my take. (off subject abit, but young dynachrome worked 9 months as a dishwasher and cook for minimum wage. Not much left over)
These folks have minimal living expenses. They live very frugally and live together in large groups. Even many of those with families leave children behind to come here and work. Those people tend to send their money back to their families.
Ya, but I bet your kid spent more on soft drinks at the video arcade than this guy spent on food. ;~))
It's amazing how much hard working people can save if they are really thrifty and have never gotten into the spending habit.