Comment by CGMthrowaway

> Culture is also a luxury good, by this definition.

Has always been. One of the key ways the upper class defines themselves is by their sensitivity for good taste AKA sensibility[1] (as in "Sense and Sensibility"). Haute couture, fine arts, etc. "Good" taste is of course dynamic, but that's beside the point.

[1]An understanding of or ability to decide about what is good or valuable, especially in connection with artistic or social activities. https://dictionary.cambridge.org/us/dictionary/english/sensi...