Do some rich people only wear designer clothes? Like, is everything they have in their wardrobe designer, even down to their socks and underwear?

It’s a question I’ve always had.

To clarify, I mean both old money and new money, from high-level millionaires to billionaires. And when I say designer, I mean across the entire spectrum. Not every designer brand is loud and famous like Gucci. What I mean is, do these wealthy people ever buy clothes, underwear, socks, etc., from stores like Walmart, Target, and other regular retailers, or is everything in their wardrobe designer?