I think you already know that it isn't. But this article goes into some depth in answering the question...
You can’t have infinite growth on a finite planet. That should be a commonplace idea. And it inevitably means facing up to the necessity of putting an end to capitalism in favor of an economic system of rationality, sustainability, and equity for all the world’s peoples.
Capitalism is dependent on consumerism. Household consumption (all the things people buy for personal use, from toothbrushes to automobiles) constitutes 60-70% of a typical advanced capitalist economy’s gross domestic product; it is because of this dependency that so much money and effort is put into advertising and marketing, creating ‘needs’ we didn’t know we had, and the pervasiveness of planned obsolescence.
Two statistics provide perspective on the high cost of ‘new and improved’ — about 40% of U.S. landfill waste is discarded packaging, and the cost of packaging constitutes 10% to 40% of a product’s retail price. No rational system would propagate such waste, but capitalism is not rational; the endless pursuit of profit and indifference to environmental costs are its natural consequences.
That's just a brief excerpt. I hope you'll read the rest.