In the wake of catastrophe comes the whiff of unrest

When news arrived of the earthquake in Sichuan, my mind turned to Zheng Sunman, a security executive I met on a recent trip to China. Zheng heads a Guangzhou-based company that makes surveillance cameras and PA systems for the government.

Zheng was determined to persuade me that his cameras are not being used against pro-democracy activists. They are for managing natural disasters, Zheng explained, pointing to the freak snowstorms before the lunar new year. During the crisis, the government "was able to use the feed from the railway cameras to communicate how to deal with the situation and organise an evacuation. We saw how the central government can command from the north emergencies in the south."

Of course, surveillance cameras have other uses - like helping to make "Wanted" posters of Tibetan activists. But Zheng did have a point: nothing terrifies a repressive regime quite like a natural disaster. Authoritarian states rule by fear and by projecting an aura of total control. When they suddenly seem absent or disorganised, their subjects can become dangerously emboldened. It's something to keep in mind as two of the most repressive regimes on the planet - China and Burma - struggle to respond to devastating disasters. In both cases the disasters have exposed political weaknesses - and both crises have the potential to ignite levels of public rage that would be difficult to control.

When China is busily building itself up, creating jobs and new wealth, residents stay quiet about what they all know: developers regularly cut corners, while local officials are bribed not to notice. But when China comes tumbling down - including at least eight schools in the earthquake zone - the truth has a way of escaping from the rubble. "Look at all the buildings around. They were the same height, but why did the school fall down?" a distraught relative in Juyuan demanded of a foreign reporter. "It's because the contractors want to make a profit from our children." A mother told the Guardian: "Chinese officials are too corrupt and bad ... They have money for prostitutes and second wives but they don't have money for our children."

That the Olympic stadiums were built to withstand quakes is suddenly of little comfort. When I was in China, it was hard to find anyone critical of the Olympic spending spree. Now mainstream websites are calling the torch relay "wasteful" and its continuation in the midst of so much suffering "inhuman".

None of this compares with the rage boiling in Burma, where cyclone survivors have badly beaten at least one local official, furious at his failure to distribute aid. Simon Billenness, co-chair of the board of directors of the US Campaign for Burma, told me: "This is Katrina times a thousand. I don't see how it couldn't lead to political unrest."

The unrest of greatest concern to the regime is not coming from regular civilians but from inside the military - a fact that explains some of the junta's more erratic behaviour. We know that the Burmese junta has been taking credit for supplies sent by foreign countries. Now it turns out that it has been taking more than credit - it has been taking the aid. According to a report in Asia Times, the regime has been hijacking food shipments and distributing them among its soldiers. The generals, it seems, are "haunted by an almost pathological fear of a split inside their own ranks ... If soldiers are not given priority in aid distribution and are unable to feed themselves, the possibility of mutiny rises." Mark Farmaner, director of the Burma Campaign UK, confirms that before the cyclone, the military was already coping with a wave of desertions.

This relatively small-scale theft of food is fortifying the junta for its much larger heist - the one taking place via the constitutional referendum the generals have insisted on holding. Enticed by high commodity prices, Burma's generals have been gorging on the country's natural abundance, stripping it of gems, timber, rice and oil. As profitable as this arrangement is, junta leader General Than Shwe knows he cannot resist the calls for democracy indefinitely.

Taking a page from the book of Pinochet, the generals have drafted a constitution that allows for future elections but attempts to guarantee that no government will ever have the power to prosecute them or take back their ill-gotten wealth. As Farmaner puts it, after the elections the junta leaders "are going to be wearing suits instead of boots". Much of the voting has already taken place, but in cyclone-ravaged districts the referendum has been delayed until May 24. Aung Din, executive director of the US Campaign for Burma, told me that the military has stooped to using aid to extort votes. "Rainy season is coming," he told me, "and people need to repair their roofs. When they go to purchase the materials, which are very limited, they are told they can only have them if they agree to vote for the constitution in an advance ballot."

The cyclone, meanwhile, has presented the junta with one last, vast business opportunity: by blocking aid from reaching the highly fertile Irrawaddy delta, hundreds of thousands of mostly ethnic Karen rice farmers are being sentenced to death. According to Farmaner, "that land can be handed over to the generals' business cronies". This isn't incompetence, or even madness. It's laissez-faire ethnic cleansing.

If the Burmese junta avoids mutiny and achieves these goals, it will be thanks largely to China, which has vigorously blocked all humanitarian intervention in Burma. In China, where the government is going to great lengths to show itself as compassionate, news of this complicity could prove explosive.

Will China's citizens receive this news? They just might. Beijing has, up to now, displayed an awesome determination to censor communication. But in the wake of the quake, the notorious "Great Firewall" censoring the internet is failing. Blogs are going wild, and even state reporters are reporting the news.

This may be the greatest threat that natural disasters pose to contemporary repressive regimes. For China's rulers, nothing has been more crucial to maintaining power than the ability to control what people see and hear. If they lose that, neither surveillance cameras nor loudspeakers will be able to help them.

Naomi Klein. This article first appeared in the Nation, thenation.com