I don't know who Oscar de la Renta is but based on "runway dresses" I'm thinking fashion designer.

When I think about the job of a fashion designer, I think "entirely unrelated to sustenance or survival". For that type of clothing, I'm going with military style gear, cargo pants, fisherman's vest...stuff that's useful for foraging, fishing, hunting, etc.

The rise of the fashion designer profession seems like a Maslow's Hierarchy of Needs thing at a societal level. In a small tribe of 20 people, I don't think there's room for anyone to specialize as a fashion designer. Pretty much everyone needs to do sustenance labor. When society has flourished to a certain point, people can afford to engage in a trade like that.

It makes me think of the Roaring 20s and Weimar and modern clown world in general. They all seem "top heavy" and top heavy things often topple over.