Georgia is trying something similar with people on probation [1] so far the results aren't good, "most fruits and vegetables require surprisingly skilled handling" [2]
Under my plan, the results would be good. If the process continues as in Georgia's experiment, then we will completely solve the problem of unemployment in Georgia.
Georgia has 11k unfilled agricultural jobs. At the rates described in the article (American workers quit after 1 day), we could reduce the unemployment rolls in Georgia by 11k people/day (330k/month). For comparison, Georgia had only 54k new unemployment claims in May.
This would result in a net decrease of 280k people from the unemployment rolls per month, for Georgia alone.
That's the beauty of my plan - it is guaranteed to solve one of two problems (unfilled agriculture jobs or unemployment). We can't determine beforehand which problem it will solve, but it has to solve at least one.
1: http://www.usatoday.com/money/industries/food/2011-06-25-pro... 2: http://www.theatlantic.com/business/archive/2011/07/illegal-...