Farm subsidies are perhaps the ultimate, but secret, third rail of American politics. While entitlements are discussed out in the open, farm subsidies are rarely talked about – even though they are the most expensive subsidy Washington doles out. All told, the U.S. government spends $20 billion annually on farm subsidies, with approximately 39 percent of all farms receiving some sort of subsidy. For comparison, the oil industry gets about $4.6 billion annually and annual housing subsidies total another $15 billion. A significant portion of this $20 billion goes not to your local family farm, but to Big Aggie. (Note...