"The key to Public Choice, as you said earlier, is common sense. And common sense tells you that a politician is very much like the rest of us. A politician who's seeking office or seeking to remain in office is responsible, as he should be, to constituents. He wants to go back to a constituency and tell them that he's either lowered their taxes, or he's brought them program benefits. You plug that into politics and you have a natural proclivity of a politician to create deficits."