I don't like the phrase "post-materialist" either, because it implies this is something new. "People used to want more stuff, but now we're moving beyond that."

I don't like the phrase "post-materialist" either, because it implies this is something new. "People used to want more stuff, but now we're moving beyond that." There have always been people who want more stuff and people who don't, and there always will be. I agree that "threshold earners" is better. Another way of putting it is that some people place a higher dollar value on free time, autonomy, etc, so they aren't willing to trade as many hours for money as others are.