It’s crazier than that. I’d never heard of this, but it sounds as if the government can create set-asides in any sort of product it wants, not just raisins. Corn, beef, wheat, soy—you name it—in the name of regulating markets for “fair” prices. That means a farmer has to pay a production tax in kind, and then, if he still manages to make money on the remaining goods, he pays income tax too!