VoicesLetter: Prisons show results of society's credit-card valuesBookmarkCommentsGo to commentsBookmark popoverRemoved from bookmarksClose popoverSir: If, as John Major says, prisons are an effective deterrent, why aren't they empty?Yours faithfully,MARK WALFORDLondon, W2Join our commenting forumJoin thought-provoking conversations, follow other Independent readers and see their repliesComments
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