Wherever did you get that idea? I stated that when the economic system, that is the means by which people satisfy their material needs and wants, becomes their raison d'etre, they tend to abandon the spiritual component of their existence. This can occur at any point along the continuum from purely free markets to a rigid command economy.
Well then you’ve raised a strawman, because I don’t think anyone, including Ayn Rand, has claimed that free markets are the raison d’etre. Instead, free markets are a natural corollary of some other raison d’etre, namely that human beings possess a right libery.