Dan Carney. “Why U.S. fuel-economy standards don’t work”. MSNBC. 4 Oct. 2007 – “Recognizing that burning less fuel is beneficial for a multitude of reasons, those countries employ an array of policies designed to encourage frugality. Some countries have a higher sales tax on cars with bigger engines. The fuel itself is taxed, making its purchase sting enough that consumers are willing to sacrifice some interior space. The tax on diesel fuel is lower, encouraging sales of more fuel-efficient diesel-powered models. Friedman seeks to be seen as punishing “Detroit” rather than the little guy. And the little guy is a factor. People with lower income spend a proportionally higher amount of their money on gas, so liberals are reluctant to tax them directly.”