...the big fashion houses and leading photographers are tiring of the drama that comes with plucking girls as young as 15 from obscurity and propelling them to sudden stardom. Too often, models were showing up to photo-shoots hours late or drug-addled. This wasted a huge amount of time and money. Fashion houses are now keen to avoid trouble. Many find that educated models show up to work on time and don’t go doolally as often.
The Economist says it's — what else – economics pushing fashion houses to hire older, more educated models, but it sounds more like the designers are just a bunch of jealous old squares who don't get it, man. (Do kids still say "squares?" Did kids ever say "squares?" What about "man?")