ethanol may actually make some kinds of air pollution worse. It evaporates faster than pure gasoline, contributing to ozone problems in hot temperatures. A 2006 study published in the Proceedings of the National Academy of Sciences concluded that ethanol does reduce greenhouse gas emissions by 12 percent relative to gasoline, but it calculated that devoting the entire U.S. corn crop to make ethanol would replace only a small fraction of American gasoline consumption. Corn farming also contributes to environmental degradation due to runoff from fertilizer and pesticides.But to dwell on the science is to miss the point. As the New York Times noted in the throes of the 2000 presidential race, ―Regardless of whether ethanol is a great fuel for cars, it certainly works wonders in Iowa campaigns. The ethanol tax subsidy increases the demand for corn, which puts money in farmers‘ pockets. Just before the Iowa caucuses, corn farmer Marvin Flier told the Times, ―Sometimes I think [the candidates] just come out and pander to us, he said. Then he added, ―Of course, that may not be the worst thing. The National Corn Growers Association figures that the ethanol program increases the demand for corn, which adds 30 cents to the price of every bushel sold.Bill Bradley opposed the ethanol subsidy during his three terms as a senator from New Jersey (not a big corn-growing state). Indeed, some of his most important accomplishments as a senator involved purging the tax code of subsidies and loopholes that collectively do more harm than good. But when Bill Bradley arrived in Iowa as a Democratic presidential candidate back in 1992, he ―spoke to some farmers‖ and suddenly found it in his heart to support tax breaks for ethanol. In short, he realized that ethanol is crucial to Iowa voters, and Iowa is crucial to the presidential race.
Think about ethanol again. The benefits of that $7 billion tax subsidy are bestowed on a small group of farmers, making it quite lucrative for each one of them. Meanwhile, the costs are spread over the remaining 98 percent of us, putting ethanol somewhere below good oral hygiene on our list of everyday concerns. The opposite would be true with my plan to have left-handed voters pay subsidies to right-handed voters. There are roughly nine right-handed Americans for every lefty, so if every right-handed voter were to get some government benefit worth $100, then every left-handed voter would have to pay $900 to finance it. The lefties would be hopping mad about their $900 tax bills, probably to the point that it became their preeminent political concern, while the righties would be only modestly excited about their $100 subsidy. An adept politician would probably improve her career prospects by voting with the lefties.Here is a curious finding that makes more sense in light of what we‘ve just discussed. In countries where farmers make up a small fraction of the population, such as America and Europe, the government provides large subsidies for agriculture. But in countries where the farming population is relatively large, such as China and India, the subsidies go the other way. Farmers are forced to sell their crops at below-market prices so that urban dwellers can get basic food items cheaply. In the one case, farmers get political favors; in the other, they must pay for them. What makes these examples logically consistent is that in both cases the large group subsidizes the smaller group.In politics, the tail can wag the dog. This can have profound effects on the economy.