we have better drugs now, why are we still dressing like we are opium addicts??

Look up "Beau Brummely" and "Great Renunciation".

US southern-prep khakis, blazer, shirt and tie, slightly longer hair is pretty much the exact look Brummely and his dandies created and socially enforced through mockery.

Some people claim that the underlying force granting Brummely the ability to do so had to do with the center of power shifting from traditional nobility to financiers.