Eat the Rich

When Ed Anderson discards his life to become a homeless person, he has no idea of the shit storm about to happen. Almost overnight, the city's homeless population spikes.
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So does the murder rate.
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Ed learns that aliens posing as homeless people are eating the city's wealthiest residents. He tries to warn the police, but they think he's crazy.
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The situation is worse than Ed describes, though.
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He's right about the aliens. They're here to free humans from wealth and poverty. The flesh of the rich is just a tasty reward for their hard work. And if humans refuse to embrace the utopia imagined for them, there is a plan B:
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KILL EVERYONE.