I contest the original premise. When I was traveling a lot for work, I spent a lot of time packing to ensure that I had enough combinations of shirts, ties, belts, and shoes such that I never wore the same outfit twice. Yes, I did economize on suits, and tended to bring only one; that's because men don't have the female privilege of having such a vast variety of acceptable business-wear. Being able to dress in outfits for work that don't take up nearly an entire carry-on by themselves is a luxury men don't have. Shit, I wish I could wear skirts; they take up less packing space.

On the other hand, the shoe situation for women sucks. A man can get away with one pair of shoes for a week; it's a lot harder for women to match a week's worth of business clothes to a single pair of shoes... and in a pinch, a man can wear those shoes anywhere, whereas a woman doesn't want to be in the same heels all day, every day. That's an advantage men have.

Women can mix and match outfits just as well as men do; they can get away with two different shirts and two different pants and make it last 4 days without comment, same as a man can. And a guy that wears the same suit, shirt, and tie 4 days in a row will definitely get noticed, and not in a positive way.