> Over the years I have read a few articles or blogs
Without linking the blogs or articles it’s hard to say much.
Inflation is a topic that attracts a lot of quackery. There are a lot of blogs and websites that go viral from time to time with claims that the “true” inflation number is dramatically higher.
There is a quick reality check you should run whenever you encounter these claims: Take the claimed inflation number over a period of time and calculate the net multiple. Then run a reality check on something like a $500,000 house or a $5 hamburger.
There’s one prolific website and author who claims the “true” inflation rate is some number like 11% going back decades. If you do the math, that means something purchased 50 years ago in 1975 would cost 185 times less. A $1,000,000 home today would have been $5,400 in 1975 and a $5 hamburger today would have been less than $0.03. Obviously these numbers don’t work, so you can discard the author’s claim.
Actual inflation numbers over long periods are very sensitive to small changes due to compounding. Even over a 10 year period. When you see someone claiming dramatically different results, run a quick math check.
Also be careful for the cherry pickers: They’ll identify one or two outlier year-over-year jumps (eggs during COVID, home prices during a housing rush, insurance prices in a city after a fire) and try to use those as their basis.