This is reductive. If "10% more productive" translated into >= 10% more revenue as a percentage of their wage, it would make sense but it varies so wildly, that

This is reductive. If "10% more productive" translated into >= 10% more revenue as a percentage of their wage, it would make sense but it varies so wildly, that it's not a useful statement. Some will translate to increased revenue, a few times over, (which incentivizes the vendor to increase the price accordingly) and some will be net negative.