I believe this comic panel contains all the context necessary.
Out of Context Comics
Comic panels taken out of comics so we can make fun of them!! We love the golden age stuff!
Rules:
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Comics must come from actual comic books. No AI or Photoshops.
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Single panels are preferred.
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Comics should be unintentionally funny. Spider-man cracking wise is not what this is about.
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Don't be a dick.
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I can't believe I've had to add this... NO RACISM.
Exactly. Clearly he has 2 billion kids - that's why the world population is so high today and they call that generation the "Baby Boomers".
Turns out their kryptonite was lead tho.
I'm a mod so I'm allowed to break the rules, but I promise to ban myself if I do it again.
My work here is done.

Taxing a guy who saves the world on a regular basis seems rude.
Also, he fights for truth, justice and the American way, and what's more American than finding a loophole to avoid paying taxes?
Well, he fights for the American way, but he's actually technically a citizen of the Cayman Islands. His real name is Kal-LLC.
Wait, why does Superman have income? Has he been charging the people for his services this whole time?
He keeps sending bills to Lois and she just keeps paying them like an idiot.