Interesting article - shows you the "casualness" of todays society.
Have you ever see pictures taken during the Depression of the '30's - poor, out of work guys wearing ties, and often suits - things started changing in the '70's - in the 50's and 60's, you went somewhere, you invaribly dressed up.
I did find a quote in the article interesting:
"And perhaps they figure, if we {talking about airline employees} had to dress well to fly, what's up with all the passengers who get to sit in first class dressed like Richard Simmons?" I was a commercial lender for most of my business career, and frequently called on business owners dressed casually, when we (I) had a dress code the mandated a suit and tie - I never "resented" the fact that a business owner dressed much less formally then I - maybe the above quote is one of the things wrong with the avaition industry
(Be thankful they are doing business with you; your dress code has zero to do with how your customer dresses

)