Too much noise frankly, and often actual output, let along profit, has little to do with any individual employees productivity. And most employees are part of a relatively small silo which would require extensive work to really figure out how to make them productive, and if they got more productive, the rest of the organization is likely to tarpit them.

Think of it as an army - infantry may be visible on the ground, but no matter how awesome an individual infantry person is, their transport folks, logistics folks, planning folks, etc. have a far more important role in winning the war. And everyone has to be effective, or that war won’t be won.