Are School Librarians Expendable?

Are School Librarians Expendable?
School librarians are on the chopping block as states and cities seek to cut their education budgets.

In New York City, education officials say that after several years in a row of cutting costs, freezing wages and eliminating extracurricular activities, they may have no choice but to turn to librarians. And with technological advances, education policy makers are rethinking how they view library services in general.

Do superintendents and principals see librarians as more expendable than other school employees? If so, why?