I'd say you're assigning to malice what is adequately explained by ignorance.
Like I said, I can easily believe Tomasi thought "Curator" just meant "Museum Manager" and not a graduate+experience level post.
Certainly hardly any mention is made by any member of the cast, including the staff. One DOES make a snarky comment and Dick counters it with a display of an intimate knowledge of the museum, it's history and architecture, which would be enough to convince most that he can hold a job, IF you didn't know the specific experience that the title of Curator brings.