I wrote a comment and then thought "I should really look up where the term consumerism comes from".

Because I didn't know and maybe I should. I spent half my life unaware of the origin of "capitalism".

In the early 20th century, "consumerism" was supposedly used to mean something like "consumer protection".

But in the mid 20th century, it was apparently adopted as a preferred term to "capitalism" in order to contrast Western economies with communism.

Then, by the 60s or so, it morphed into something like the modern sense of "a policy of encouraging consumption".