Rupert Murdoch’s plan to put News Corporation websites behind a pay wall is "going to be like putting toothpaste back in the tube." That’s according to Jack Matthews, chief executive officer at Fairfax Digital Media, the online arm of one of the News Corp.’s biggest rivals in Australia. “I don’t know of too many industries where something has been given away for free for 10 or 15 years, and then suddenly charged for it,” said Matthews, whose company publications include the Sydney Morning Herald and The Age.