Government subsidies can be critically analyzed according to a simple principle: You are smarter than the government, so when the government pays you to do something you wouldn't do on your own, it is almost always paying you to do something stupid.
P. J. O'Rourke (2007). “All the Trouble in the World: The Lighter Side of Overpopulation, Famine, Ecological Disaster, Ethnic Hatred, Plague, and Poverty”, p.198, Grove/Atlantic, Inc.