As the prolific and insightful author anonymous once said: “The two things you don’t want to see being made are legislation and sausage.” The latest evidence for this same observation is how the federal government manages and calculates the Consumer Price Index.

Looking at how the CPI is calculated shows how inflation is underestimated and denies Social Security recipients full cost of living adjustments, eroding the real value of their Social Security income.

For the uninitiated, the standard CPI is the benchmark measure of inflation calculated monthly by the U.S. Department of Labor’s Bureau of Labor Statistics. Widely used and closely watched, the federal government uses it for multiple purposes. For example, the CPI is the standard means for adjusting Social Security benefits paid monthly to about 56 million Americans. The goal of this cost-of-living adjustment, first paid in 1975, is to prevent a decline in the purchasing power of retirees’ benefits.