I think their question is more about how we would implement that. Marx believed that proletariat uprising would be the "how," and that it is an inevitability of end stage capitalism. But the nature of capitalism keeps people from attempting that. This is a system that we are forced to participate in if we want to survive. We need food and shelter and we don't want to get arrested and/or murdered by cops for revolting. With that in mind, we have to get to a point where we collectively have nothing left to lose.