That particular graph has several issues. The first of which is the lack of scale. It's set up so the tail ends nicely around $100 dollars a day when in reality

That particular graph has several issues. The first of which is the lack of scale. It's set up so the tail ends nicely around $100 dollars a day when in reality it should extend over 2 orders magnitude to the right. When talking about inequality, if you can say "most of humanity" exists in this hump orders of magnitude away from a select few that represents a problem.