"It is only consumption that consummates the process of production, since consumption completes the product as a product by destroying it, by consuming its independent concrete form. Moreover by its need for repetition consumption leads to the perfection of abilities evolved during the first process of production and converts them into skills. Consumption is therefore the concluding act which turns not only the product into a product, but also the producer into a producer. Production, on the other hand, produces consumption by creating a definite mode of consumption, and by providing an incentive to consumption it thereby creates the capability to consume as a requirement."

-some old austrian guy who's probably dead.

This comes at the end of Marx describing the contradiction of production and consumption. I believe he knew people would get into the chicken and egg thing so this is his answer. Production and consumption are never really in balance, and they do beget one another. That's the definition of contradiction in the Marxist sense, opposing forces that cause one another and depend on one another to exist. But production is what allows consumption at all. You can't consume that which isn't produced. Consumption is the end of the line in a specific thread of production. Which are kind of obvious if you really think about it.

Since we aim to control the means of production and not the means of consumption, then we focus on that. Reduce it at the source.