Only takes one bad year.
Check it out:

Agriculture is a risky business. The report by the Risky Business Project focuses on the potential effects of global climate change (GCC) on U.S. agriculture, one of five principal impact foci. The authors challenge us to think about a wide variety of causes, effects and solutions. It’s a lot to digest. Here is one angle that isn’t specifically mentioned and relates to the recent farm bill debate.

Crop insurance and food assistance are effected as income subsidies under the assumption that needs are episodic and money solves the problem. Handing out money is a solution when all we need is a bridge from a bad year to a good year or from unemployment to the next job; but what if the bridge goes nowhere? What if one bad year just keeps leading to more and increasingly bad years