That's your pet issue, not mine. I find the topic interesting enough that I would certainly read any sources or logical arguments you presented, but so far I'm just seeing "feelings".
As for CPI, there are two fundamental issues that all result in lower-than-actual reported CPI.
1. If a household spends all of its money, and prices at the grocery store rise, it has to change which items it buys, likely switching to items which experienced lower inflation during that period. The BLS weights are determined by a survey of what median households bought, not what they bought last year before prices rose. That's a mistake that leads to lower reported inflation numbers.
2. Hedonic adjustments are free rein for arbitrary adjustments. For example, new vehicles did not go up in hedonic-adjusted price from 1997 to 2020 according to the BLS [0]. An automatic Toyota Corolla was $12373 brand new in 1997. It was $19700 in 2020. While operating expenses have decreased somewhat (due to better fuel economy), does that cover the 60% price spike to the median purchaser? No, fuel economy only improved 35%, and meanwhile gas prices have tripled so absolute operating expenses have increased. They throw in a bunch of other nonsense justifications like that new cars have bluetooth and other features that counter-act the price change. Our inflation numbers over those years did not incorporate a price increase AT ALL, so it's a fair assessment that real inflation was higher based on that alone. The Big Mac index has probably always been the most accurate assessment, free of political pressures.
