In this Slate article Jacob Weisberg explains how the Republicans have developed the unusual political philosophy he calls "interest-group conservatism":

"One might have expected that once in command, conservative politicians would work to further reduce Washington's power and bury the model of special-interest-driven government expansion for good. But one would have been wrong. Instead, Republicans have gleefully taken possession of the old liberal spoils system and converted it to their own purposes. The result is the curious governing philosophy of interest-group conservatism: the expansion and exploitation of government by people who profess to dislike it."