Easy answer: you don't.
Just like when water is scarce and expensive and you want to grow water intensive crops for cheap. Then the result is not that water needs to be cheaper, but that you simply chose the wrong crop.
Just like when water is scarce and expensive and you want to grow water intensive crops for cheap. Then the result is not that water needs to be cheaper, but that you simply chose the wrong crop.
On the other hand, it would then take them longer in terms of calendar days to get the same income, and all their other expenses are likely to stay the same. If they normally moved on to other jobs after the harvest, this would mean reduced overall income. Also, the difficulty of the job is factored into the pay they receive (the article specifically says their hourly wage is higher than normal farm labor), so they would likely be paid less for this less demanding crop. It still doesn't seem like much of a solution.