Leaving aside how arguable it is, this definition of living standards is not relevant to this subthread, which is about the claim that prosperity has not been

Leaving aside how arguable it is, this definition of living standards is not relevant to this subthread, which is about the claim that prosperity has not been increasing for decades, followed by an unfavorable comparison to the 40s/50s. By such a useless definition, the claim is tautological: of course prosperity can't have increased of living standards are defined as being eternally static. Incidentally, it's a subthread you started and a claim you made, so it's a little bizarre to see the goalposts being moved so dramatically.