That’s the way some people think of equality, and contrasted with what equity looks like, it demonstrates the flaw in that line of thinking.
Also, there is a version of this image where the fence is completely removed and the subtitle is “justice” or something like that, which is also a good contrast to both equality and equity.
The image cuts off the billionaire sitting on top of the large stack of boxes, with each hand resting on boxes stacked slightly higher on either side.