Dissent Of The Day II

A reader writes:

I share your opinion of Romney, but I'm afraid the graphic showing the relative net worth of  is a classic example of how to mislead with graphics.  The chart purports to show the net worth using the height of the candidates-- a simple bar graph where the bars are replaced by images of the candidates.  In this case, Romney  is 7x the net worth of his nearest competitor.  However,  the images are two dimensional, so the *area* of the Romney image is 7 times 7 = 49x, giving the impression that Romey's worth is 49x larger.  Furthermore, humans infer that other humans are three dimensional (even Romney!), thus we intuit that Romney's net worth correlates with his *volume*, which is 7 times 7 times 7 = 343x larger.