Or as if they're ready for bed.
"The elimination of the coat and tie dress code reinforces the realization that when Americans travel, they look like refugees from a third world country."
Why get dressed up just to get stripped searched in the airport line. Most travellers where what is comfortable and, what will cause the least problems with security trying to get to your fully booked flights and being crammed on them like cattle and told to shut-up and just sit there.