The Dilbert strip joined the Peter Principle in bringing into public consciousness and culture ideas that people were privately aware of, but not so much publicly. The strips created a medium for communicating ideas, a sort of shared language...in other words, memes before we knew what memes were.
It reminds me of many years ago when a presenter claimed several decades ago Life Magazine had a big story on child abuse that brought the subject into the public consciousness. It's not that nobody but abusers and victims knew it happened, but that it was widespread and common enough to be that much a 'thing,' and to make people aware each other knew it, was news.
If anyone thinks the strip is overly cynical, consider the term 'Human Resources.' The very title tells you a bit about how owners see staff. Human (not individualized, just a categorization, like equipment, coal for a furnace, etc.) resources (something to use, that you try to extract the most value from at the lowest cost).
Someone once popularized the phrase 'The banality of evil.' Adams popularized navigating the banality of office life.