It's dishonest to say in one comment that certain workers "produce more" and in the next that you are speaking in terms of "cost accounting" productivity (that is, identifying which workers are likely to accept less pay for the same task).
You know that workers are not perfectly interchangeable, everybody with any sense knows that. You also know that cost accounting isn't an exact science when it comes to the variability of people.
But if cost accountants were worthless, businesses wouldn't employ them.
