In response to some of the previous comments, I think it's worth remembering what happened in the UK some time ago (1996?). Then, the Labour opposition's Andrew Smith, a Shadow Minister at the Treasury, stated that 'Our air is not for sale.' About 20 minutes after Labour were elected to power, that statement was forgotten and plans were made to privatise NATS. It should be obvious that what parties say when they're in opposition and what they do in government aren't always/usually the same. Maybe Spain will be different.