[RestlessMind]

> Getting rid of good workers because you don't personally like them? Keeping your mates even if they're useless?

Things are rarely so clear-cut. Usually there are shades of gray and humans tend to develop affinity for the ones they interact with in person. So if two colleagues are similar in performance, one in office gets preferential treatment due to unconscious bias.

That's just human nature and how we have evolved. If you want to learn more about it, here is a pointer - https://www.betterup.com/blog/proximity-bias