Capunderpants, I don't want the libraries to close. I don't agree with it. I happen to think that most libraries are fantastic and fulfil very important role, not just by providing books, computers etc., but a social function, especially for the poor and lonely.
However, I wouldn't be able to say, hand on heart, that libraries are essential. On the special needs board, a poster has told us that her severely disabled child's respite home in Sheffield (Nick Clegg's patch no less), is to close, with utterly disasterous consequences to her family. My family would collapse if my son's respite home closed and I would be forced to ask the local authority to put him in care. Full stop.
If my library closed, my family would not collapse. I would continue to source my books from a wonderful charity shop (all books 50p or less), and I would go to an internet cafe if I wanted to go online. My children have access to an IT suite. Anyone on a very low income may well have been give a laptop to use at home by the last government.
There are services that are essential, and there are services that are wonderful. Libraries fall into the latter category IMO