Let's brush-up on the soon to expire be renewed Farm Subsidies: here.

Two-thirds of all farm production--including fruit, vegetables, beef, and poultry--thrives despite being ineligible for farm subsidies.[11] If any of the five justifications were valid, these farmers would be impoverished, near bankruptcy, or replaced by imports, and both the supplies and prices of fruit, vegetables, beef, and poultry would fluctuate wildly. Clearly, this has not happened. In this controlled experiment comparing subsidized and unsubsidized crops, the doomsday scenarios described above have not occurred for unsubsidized crops.

The most logical explanation for the persistence of farm subsidies is simple politics. Eliminating a government program is nearly impossible because recipients form interest groups that relentlessly defend their handouts. The public paying the costs is too busy going about their lives to challenge each wasteful program. Furthermore, supporters of farm subsidies often repeat the five justifications, espe cially the myth that these policies aid struggling family farmers. The difference between perception and reality in farm policy is large. (emphasis mine)