Xkcd: money

Previous submissions:

http://news.ycombinator.com/item?id=3261677 (2 days ago, when the link was slashdotted)

http://news.ycombinator.com/item?id=3261498 (a thread with comments)

http://news.ycombinator.com/item?id=3263367 (2 days ago, no comments)

Why two dimensions?

Why not a simple bar chart?

Maybe there's a reason for blocks, but I can't tell. I can only see a fraction at a time. There was another xkcd chart like this before and I didn't see a reason for blocks instead of lines then either.

Conclusion: I should buy a bigger screen supporting at least 2560x1080 resolution.