Earlier quoted context omitted.
Did you even read CPI information from the link you posted? Literally every page is riddled with opaque reference to arbitrarily defined values and modifiers inserted by the FED. >In calculating the index, price changes for the various items in each location are aggregated using weights , which represent their importance in the spending of the appropriate population group . What do you think "aggregated using weights…
A mother who has cancer tells the kids what they need to hear. You tell the kids too much, and they grow up thinking there is no point to life. Which is not right or good for them. If you were in her position or the FED's you would do the same.
The idea that the Federal Reserve lies to the populace to keep them productive is absurd. Every recession has been addressed (eventually) by the Federal Reserve. There have been catastrophic blunders, such as the tightening of credit after the sustained bank failures in 1929-1933, and the vastly too-late raising of interest rates at the height of the housing bubble in 2007.
However, the directors were rightly castigated for their failures; Alan Greenspan is still mocked for failing to address reality. The Fed is blamed as a major cause of the severity of the Great Depression. Yellen et. al. have been criticized for their caution (financial news calls it "dovish" behavior). The Federal Reserve have every motivation to tell it like it is, lest they end up like Alan Greenspan.