Title inflation generally occurs when a profession becomes old, standardized, and uninteresting. See investment banking, etc, where the median title is a VP
Our "Director of First Impressions" (receptionist) would like a word with you ;-)
Also sometimes a certain word just becomes more fashionable than those used previously, “analyst” is entirely generic title and gets used in every field and that previously had roles of clerk, associate, specialist, etc. which are mostly generic words themselves