Almost four decades have passed since the United States scrapped its last currency ties to precious metals. Our copper and nickel coinage still retains some metallic value, but not nearly enough for the purpose of currency tampering—the historic temptation of inflation-plagued or otherwise wayward governments, including, at times, our own. Instead, since the 1960s, Washington has been forced to gull its citizens and creditors by debasing official statistics: the vital instruments with which the vigor and muscle of the American economy are measured. The effect, over the past twenty-five years, has been to create a false sense of economic…