Why is it that when budget cut happens ..... the axe falls first on Libraries and books?

Why is it that when budget cut happens ..... the axe falls first on Libraries and books?
It is very sad to know that "After years of downsizing, three remaining Hartland Schools media specialists are being transferred to classrooms" ...... Read further at 

: http://www.livingstondaily.com/story/news/local/community/hartland/2016/06/07/school-librarian-positions-cut-hartland/85550474/

Ref : http://hartlandtwp.com/