Living standards through history have elevated greatly because we have been able to innovate and distribute in better and better ways. If that is what you mean by greater productivity, then yes, I agree with you.
However, living standards throughout decades have risen and fallen in accordance with the rights given the average citizen to protect and enhance their standards of living as compared to what is available at the time.
Meaning the best society we've seen so far has been proven to be one that is productive and prizes the well-being of its citizens.