Or Steve Jobs, he's a billionaire, yet he only appears to own Levi's 501's and black turtleneck sweaters.
I'm pretty much the same, when I worked I had 2 basic outfits, summer and winter. Winter was suit, white shirt and tie, and black Florsheim wingtips. Summer was Slacks, white shirt and tie, and black wingtips. All my socks are identical black ones (so no pairing up required and lost socks are not even noticed.) I have 10 ties which I wore in strict rotation. I have about 30 identical white shirts, I'd buy 5 or 10 whenever they went on sale and retire the oldest old ones.
Now I've retired I wear black tracksuits all day every day in winter, shorts and a tee shirt in summer, except once a week when I go shopping. That's usually Levis, trainers and a slightly dressy shirt or sweater, depending on the season.
I can't be bothered with clothes. I used to be a "dedicated follower of fashion" (great song) until I joined the army, when you know exactly what you'll wear every day and I found I liked the simplicity of it. I also hate (with a passion) shopping for clothes, this way I never need to try anything on because I always buy the same things from the same shops so I know they'll fit. God, I sound boring.
Cheers