The problem is with productivity is that its that counter-intuitively, it might only be a measure of efficiency in absolute terms. For example consider a famil

The problem is with productivity is that its that counter-intuitively, it might only be a measure of efficiency in absolute terms. For example consider a family that owns a plantation powered by slave labour. If you look at their gdp/work its close to infinity. Then you go to the plantation and measure the productivity ratio of this as an economy and it would be very low. So it depends a lot who captures the value of work and how you measure that as well. The more capital you have and the more you can extract wealth without working the more productive you will be.