Which "employee metrics" do you find useful for that?
Because in my experience, it's pretty much guaranteed to be someone who isn't anywhere near leading on the type of metrics these discussions are talking about - that's making the biggest impact and amplifies _team_ productivity. Those people don't close a dozen Jira tickets before lunch, they are the people who spend two weeks actually finding and fixing the root cause of that one annoying ticket that 15 other people have closed only to find the problem re occurs. They aren't top of the leaderboard in git commits, because they actually read the RFCs or dependancy source code while working. They sure as hell don't always write the most LOC in a week - I want the "minus 2000 lines of code" guy, not the one who's best at gaming whatever metrics you use.