The whole Jesus = Zombie bit is an example of profoundly immoral argument. Name anything you believe in, absolutely anything, and somebody can oversimplify and reduce it to an absurdity or a profound insult. Marxist? Then you believe the state will wither away by getting larger so you're obviously an idiot! Capitalist? Then you worship a giant invisible hand that requires occasional human sacrefices - what a maroon! Pick a side, and then describe a strawman version of the other side and declare yourself winner, that's all you're doing.
Point taken. The difference is that interpreting economics from a Marxist or capitalist viewpoint does not require ignoring well-established physical laws.