The scale on the left doesn’t start at zero, so the difference is smaller than the size of the bars make it seem. The difference between #1 Slackware, and last spot Arch, is 0.75 points in a 0 to 10 scale, but the bar size of Slackware is about 2.5x bigger than the bar for the Arch users.
What you described is socialism; a communist society would also be a stateless, classless, and moneyless society.