the so-called productivity miracle is a direct result of offshoring - US corporations offshore jobs to lower wage countries, so of course their productivity numbers go way up, especially when they offshore low productivity work like customer service call centers, IT infrastructure maintenance, white collar back office accounting tasks, etc. and those wage savings go right to the bottom line also, profits are up for the same reason, as is executive compensation.
Thank you for making the case for a dynamic labor market and structural change of production. The allocation of labor resources are being reallocated to their most efficient uses. See, markets do work just as learning can occur (as you have properly demonstrated).