What’s new??. All through my career, 10% of the workers did 90% of the work. Best time of my working life was when I finally got to where I could FIRE the slackers!
I discovered that doing group projects in college. I always ended up being the one who was supposed to receive everyone’s contributions and type up the final paper. Quickly discovered that some never did anything, and most of the others turned in such shoddy “work” that I would usually end up having to write the entire paper myself at the last minute. Needless to say, I quit allowing myself to be talked into taking on that duty. It was always so tough to stand up there in front of the class, presenting “our” paper, and to see the slugs in the group receive the same accolades that maybe only a couple of us deserved. I learned a lot about people and socialism/communism from those experiences.
And my work life after that only confirmed those lessons.
I always heard it as the 80/20 rule... 80% of the work is done by 20% of the workers.
Sort of like our “unfair” tax system. The bottom 51% pay nothing, and usually get a refund.