This is oft repeated nonsense you can disprove yourself. Make a reasonable basket of goods, write down current prices. Look up ads for those goods over time, wr

This is oft repeated nonsense you can disprove yourself. Make a reasonable basket of goods, write down current prices. Look up ads for those goods over time, write down prices. Compute inflation. Check BLS inflation. If there were even a tiny error “artificially down” it shows up as exponentially (in the literal mathematical sense) divergent values. Your claim is false. Also there is/was many other groups computing inflation such as MITs Billion Prices Project, lots of hedge funds, etc., and none have found much if any discrepancy between official BLS numbers and other methodologies.