Something tells me the aliens would be smart enough to ask questions like, "How do the factories get here to begin with?"
Even though I lean heavily toward socialism and believe an open source society is our future, we've got to move beyond memes and kindergarten oversimplifications of capitalism. Every industry and business empire ultimately starts with clever individuals working very hard on ideas that turn out to be better in some way than what's already around, so they can grow and grow to become giant corporations. Over the course of time a lot of people get involved who don't work any harder than a normal person but are just paid a lot more, and others simply inherit the money. Those are really ones everybody gets upset at,. The innovators and entrepreneurs deserve recognition and reward, we just have to find a way to do that without creating oligarchs and vast blocks of wealth.