@doctorjohn, indeed! Enough is definitely relative, and very true about young families... we see that firsthand with our oldest (30) who has now bestowed 3 grandkids on us.
In the end, I think that boils down to "needs based consumerism" vs. "ego-based consumerism." I have several pairs of good shoes. Suddenly having a dozen pairs of Ferragamo shoes would in no way affect how I feel about myself or my life.