[wnkrshm]

Also, if you purely go by productivity, who knows, maybe the data says that people without kids and people who are sterile are just better according to the metric.

While I think you can measure 'how productive is this employee' according to some metrics, the problem is in the metrics. Someone who is mediocre at his job in the quantified sense can be a huge boon to the company due to soft skills or knowledge.

Someone not living for their job could be important to an entire community.

It is a philosophical problem, in addition to finding any kind of metric that actually kinda works.