This is a very fruitful way of looking at our global economy to understand some of it's issues, instead of just pointing fingers and saying "capitalism bad". That fight just distracts us while monopolists keep gaining power.
Something I've written about in part, if you care to read: https://medium.com/the-thinkery/thats-not-capitalism-part-three-57d4e8e44117
Either way, thanks for bringing Varoufakis' ideas to our attention. A nice little essay.