This was on the local (Alabama) news recently.
There are people looking for jobs who are willing to take them. When you go to the Employment Agency, agriculture jobs are not usually listed. It is not just a case of people being lazy, thinking they are too good, or not wanting to give up their welfare. Unless you know a farmer, it is very hard to find these jobs. For the record, I grew up on a farm. I had to do the work and didn't get paid. It wasn't fun. If I were in a position where my family needed money and harvesting was available, you bet I'd do it.