There is another side to the story, Doug.  Many people are willing to pay higher prices for better quality.  There is a smaller but still significant minority that don't mind paying a little more for ethically produced goods.  If the farmer has happy employees, the product will be better, and those that empathize with struggling workers are more likely to buy.

Also, if the farmer's labour cost is 15% of the final price, a 32% increase in wages means less than a 4% increase at the grocery store.  Would 4.15 for a bag of carrots instead of 4.00 mean you will stop buying them?  Will McDonald's quit buying tomatoes if the price goes up a few percent?

Finally, employees making a living wage will be spending that extra money, which will stimulate the economy.

Henry Ford paid his workers $5 a day when the going rate was 2.25, because he felt his workers should be able to afford his products.  Seemed to work out pretty well for him.