Let's examine just a few pretenses of knowledge. Under Social Security law, Congress forces workers to set aside a portion of their earnings for retirement. Take a 25-year-old -- let's call her "Mary" -- who earns $40,000 a year. Her Social Security tax is about $2,500. Here's my question to you: Was having $2,500 forcibly taken out of Mary's pay for retirement her best possible use of that money? Mary might have saved and invested several years to open a small business. She might have put it toward private schooling or music lessons for her child, or any number of things that might have made her, and possibly our nation, wealthier in the future.How about Congress' mandate for more fuel-efficient cars? According to a National Research Council of the National Academies of Sciences 2002 report, delivered by Dr. Leonard Evans to the Washington-based Competitive Enterprise Institute, Corporate Average Fuel Economy (CAFE) standards have contributed to between 1,300 and 2,600 traffic deaths a year. Congress' mandate for higher gasoline mileage leads to the production of lighter, smaller and less crash-worthy cars, resulting in unnecessary deaths. Through technological innovation and natural market forces, cars were already becoming more fuel efficient before CAFE standards were mandated. But more important, how does Congress know whether this loss of life is worth the amount of fuel saved? Do they even know or care about the tradeoff?