Why is this a problem? If quinoa sprouted literal diamonds we wouldn't be upset that the farmers were selling them instead of making their own jewelry.
Having your crops be too valuable to eat is a good problem to have; these farmers incomes have more than sextupled. That easily lets them sell the crop and buy other food like everyone else.
Having your crops be too valuable to eat is a good problem to have; these farmers incomes have more than sextupled. That easily lets them sell the crop and buy other food like everyone else.