The massive difference in the purchasing power of what the Official Inflation Figures tell us - when we used them to adjust an amount of money at a past date for inflation over the years and get a supposedly equivalent present day amount - is the same salary now as in 1960, shows just how fake Official Inflation Figures are.
The reason for Official Inflation Figures being so much bullshit and always on the understating inflation side, is because the lower the Inflation used in calculating the Official GDP figures, the higher that latter figure gets.
All that talk of GDP Growth in the last few decades is the product of some very consistent (and hence likely purposeful) understating of the Inflation so that the Maths used to produce the Real (i.e. Official) GDP output a higher number hence politician can proudly declare GDP is growing strongly.