I don't know if solipsism is the right word, but the second part of that sentence ("severe incuriosity about the rest of the world") is definitely a huge part of dysfunctional / mediocre organizations. I've interfaced with a lot (think low-level government bureaucracy in developing countries), and you often hear things like:
* "X is impossible" -> "How come this other person or organization has been able to do it?" -> "Nope, impossible!" -> "But what if we tried Y?" -> "Nope, impossible!"
This so-called "impossibility" is often because someone tried something and failed years ago, and so a huge part of possibility is now impossible via an immutable, sweeping generalization. No curiosity to revisit that assumption, no willingness to question if it's wrong. No willingness to consider whether times have changed, or whether someone else has figured out something we haven't. No willingness to experiment.
It was incredibly frustrating.