Do not just think that a Librarian works for a Council Establshment that issues books to the General Public, their salary scale starts as buildersmate states, and increases with responsibility and duties.
Many large organisations, such as the Media, eg BBC, other TV stations and Newspapers employ Librarians to either store or retreive stories from the past to back up current reports. Their salaries are potentially much higher, but as buildersmate state, requires formal qualifications! There are Universities which run degree courses in Library Studies.