Scottish DC writer Grant Morrison has some interesting observations about the social class differences between Batman and Superman:
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Bruce Wayne is a rich man. He's an artistocrat. Superman grew up as Clark Kent on a farm bailing hay, and he's got a boss that shouts at him if he's late to work. He's actually more human; Batman is the fetish fantasy psyche of the aristocrat overlord who can do anything he wants, and that's fascinating. The class difference between the two of them is important.[...]
People often forget Superman is very much a put-upon guy. Bruce has a butler, Clark has a boss
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