“Many argue that these weightings skew the CPI lower, as do hedonic adjustments. The motivation for this skew is transparent: since the government increases Social Security benefits and Federal employees’ pay annually to keep up with inflation (the cost of living allowance or COLA), a low rate of inflation keeps these increases modest. Those claiming the weighting is accurate face a blizzard of legitimate questions. For example, if healthcare is 18% of the U.S. GDP, i.e. 18 cents of every dollar goes to healthcare, then how can a mere 7% wedge of the CPI devoted to healthcare be remotely accurate?”
http://charleshughsmith.blogspot.com/2013/07/whats-up-with-inflation.html
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