I think they are saying that the model is flawed on a more basic level, since workers are the source of all value, and thus workers are the wine bottle. Of course trickle down economics is accurate if you view it as value trickling (or rather being siphoned) from the poor to the rich. Essentially refuting the ideology that views jobs as a resource that is provided for society by the rich, when the reality is that jobs under capitalism are workers creating value and the rich siphoning more than their fair share from the workers’ output and returning a pitance.