There are some people in the bottom too, who get a fair amount of free shit. They aren't necessarily holding anybody up, they are being carried by other people too. Often that is because of necessity. Sometimes it is not.
Even myself. when I only worked part-time (partly by choice, I did apply for full time jobs in animal control and finance that I did not get, but chose to go from full time to part time as a janitor), clearly I was not doing as much lifting as a part-timer as I am as a full timer.
But it's not all about paying work either. Many people are volunteering a lot of time too, and doing other unpaid work that helps the community. And some perhaps aren't. Of the 11,000 people who vote Democratic in this County, less than 20 of them are volunteering their time to work as a precinct person. Many of them have never even given a dollar to help the party.
Even some people at work aren't necessarily pulling their weight. Maybe some people are posting on DU while on the clock, while the guy in the next cubicle gets the report done. I work pretty darn hard at my job. My number two guy, my supposed right-hand man, he does a fair amount of slacking.
I know it won't be popular to say this, but imagine that graphic with every fifth person sitting down. The rest will have that much more of a burden.