Captain crunch, you might be on to something. Children are typically viewed as innocent, so that would justify the others removing them. The current crop on the beach has and is also demonstrating alot of the seven deadly sins too - lust, envy, gluttony, greed, pride, anger. Not sure about sloth though, maybe it applies to Micheal being an absent father to Walter.
Something that goes against it though is Micheal shooting people for his chance at redemption, or at least getting Walter back. Or maybe this was a test, and he is failing miserably by succumbing to greed.
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