Relative Perspective: The World's Economy

How does one visually appreciate relative comparisons?  In this infographic from the nominal GDP of most countries in the world is put into one chart.  A few thoughts on the depiction:

The infographic does a very good job of drawing the pure relative size contrast across countries.   With a quick glance, you pretty immediately get a sense of relative size in a way that is useful and accurate.

On the other hand, I think the secondary goal of displaying composition by sector is a little more difficult to glean from the chart.   Do our everydata readers have any ideas of ways to simplify that part of the presentation?

The original infographic and article can be found here.