The job of the media is not to protect power from embarrassment. If American spies are breaking United Nations rules by seeking the DNA biometrics of the UN director general, he is entitled to hear of it. British voters should know what Afghan leaders thought of British troops. American (and British) taxpayers might question, too, how most of the billions of dollars going in aid to Afghanistan simply exits the country at Kabul airport.
No harm is done by high-class chatter about President Nicolas Sarkozy's vulgarity and lack of house-training, or about the British royal family. What the American embassy in London thinks about the coalition suggests not an alliance at risk but an embassy with a talent problem.
Some stars shine through the banality such as the heroic envoy in Islamabad, Anne Patterson. She pleads that Washington's whole policy is counterproductive: it "risks destabilising the Pakistani state, alienating both the civilian government and the military leadership, and provoking a broader governance crisis without finally achieving the goal". Nor is any amount of money going to bribe the Taliban to our side. Patterson's cables are like missives from the Titanic as it already heads for the bottom.
The money‑wasting is staggering. Aid payments are never followed, never audited, never evaluated. The impression is of the world's superpower roaming helpless in a world in which nobody behaves as bidden. Iran, Russia, Pakistan, Afghanistan, Yemen, the United Nations, are all perpetually off script. Washington reacts like a wounded bear, its instincts imperial but its power projection unproductive.
America's foreign policy is revealed as a slave to rightwing drift, terrified of a bomb exploding abroad or of a pro-Israeli congressman at home. If the cables tell of the progress to war over Iran or Pakistan or Gaza or Yemen, their revelation might help debate the inanity of policies which, as Patterson says, seem to be leading in just that direction. Perhaps we can now see how catastrophe unfolds when there is time to avert it, rather than having to await a Chilcot report after the event. If that is not in the public's interest, I fail to see what is.
Clearly, it is for governments, not journalists, to protect public secrets. Were there some overriding national jeopardy in revealing them, greater restraint might be in order. There is no such overriding jeopardy, except from the policies themselves as revealed. Where it is doing the right thing, a great power should be robust against embarrassment.
What this saga must do is alter the basis of diplomatic reporting. If WikiLeaks can gain access to secret material, by whatever means, so presumably can a foreign power. Words on paper can be made secure, electronic archives not. The leaks have blown a hole in the framework by which states guard their secrets. The Guardian material must be a breach of the official secrets acts. But coupled with the penetration already allowed under freedom of information, the walls round policy formation and documentation are all but gone. All barriers are permeable. In future the only secrets will be spoken ones. Whether that is a good thing should be a topic for public debate.