The main issue with consumerism is not necessarily a material problem or something to do with the market economics, even though these could be impacted, but rather a cultural one.

Everything nowadays is all about technology, material wealth, and "growth" at the expense of everything else. The institutions in society including education, medicine, religion, law, or anything else related to a humane social order have become corrupted in order to facilitate this consumerist model. People go to school/university to get a job instead of for its original purpose of individual betterment; and this is even backwards because careerism and vocationalism has been confounded for this very idea.