Worker productivity ≠ value workers add to economy.

Worker productivity can also go up by providing better production facilities, ie. investing in productive capital, such as modern machinery, robotics, etc. This has obviously also happened; a worker with a huge specialized production machine can produce as much as a 100 could without.

This is not so say that workers shouldn’t join unions or that workers shouldn’t recieve a bigger/fairer part of the profit - they should. I just think we shouldn’t mislead with stats like that…