Pick a number

Do these politicians and government officials live on the same planet as me? Apparently inflation is at four-point-something percent and falling.  Really?  Then how come my standard weekly shop, which - boring person that I am - varies little from week to week, and which a year ago used to come in regularly at just under £40, now struggles not to exceed £50?  And whichever way you slice it, that's a increase of something like 20% or more.  Four-point-something - don't make me laugh!