Every year we have a statutory obligation to add 50,000 new books to our lending library collections. Just like we have had every year for the past decade. We also don't have infinitely elastic walls so common sense dictates that we have to remove a similar amount of tatty old stock and/or get more people to borrow more of the stuff in decent condition. Professional librarians wouldn't need to be told that very often, would they? They'd get on and do something, they wouldn't spend all year bleating that 'all these new books keep coming in and there just isn't the room for any of it in my library' now would they?