Or more people leave the work market (remmeber that work engagement is falling for the last two decades), more people leave the country (emigration) or many other factors that could cause this.
Emigration is not a factor in the US. The emigration level is a rounding error statistically, although I agree it could have noticeable impact on a small-economy/population country with a high level of emigration.
Work engagement is indeed a factor in the equation, and although not as statistically irrelevant as emigration in the US statistics, it’s not close to being able to disrupt the wage/productivity correlation I’m speaking of.
Anyway, your point was that increase in GDP meant increase in wages, when my point was that it was not necessarely so, because wages is not all that the GDP consists of.
Granted. My contention has been simply that wage and productivity are indeed correlated, and if so, then flat GDP in the face of increasing employment is strong evidence that the jobs being created are of low quality.