"Above all we become interesting [sic] in measuring ourselves. Word count/day, lines of code/day, hamburgers served/hour, steps taken/day, test questions/100, money earned/field’s average salary. We got quarterly reviews, job evaluations, and tested certifications." I've a dilemma: I've come to believe that this really is a bad thing, not just because we're suboptimizing output at the expense of quality of life, but…
Just remove the individual metric. We know they don't work. Incentivize the entire company for the success of the company. Pay people fairly in an uncomplicated way. Align all the incentives and don't reward anything that is not directly connected to the clear and well-communicated success of the company.
He will eventually become jaded with this and leave to some place that will recognise and reward his extra output.