https://quadrant.org.au/opinion/opinion-post/logic-the-first-casualty/
It is a fundamental principle of risk management that the benefits of any decision should be weighed against the costs. What is less often appreciated is that risk is an interactive phenomenon. Perceptions of risk often lead to people adjusting their behaviour in ways that reduce (or increase) the chances of a hazard occurring. Risk does not equal a hazard plus some fixed probability of it occurring.
University College London Professor Emeritus John Adams captured this with his idea of a ‘risk thermostat’, whereby we balance our propensity to take risks, risk perceptions and costs and benefits. Aaron Wildavsky perhaps captured this most parsimoniously in his aphorism that ‘the secret of safety lies in danger.’
But overestimating risk can lead to costly responses. In one famous example the 1976 Swine Flu epidemic in the US resulted in the rushed development of a vaccine that was far worse than the disease, causing many cases of Gullain-Barré Syndrome, a rather nasty immune system disorder. This was described in detail by Robert Formaini in his excellent book The Myth of Scientific Public Policy. Unfortunately, all too often, governments do not understand that public policy cannot be decided solely by scientific experts, because human conduct frequently undermines the intentions of policy-makers by exhibiting behaviour scientists did not anticipate.
The appropriate medical field for responding to pandemics is epidemiology, not immunology. As Nobel Prize winning immunologist Peter Doherty put it in an interview on Sky News on March 26, he’s a ‘lab guy’, not an epidemiologist. Good epidemiology should, of course, include a good measure of social science to cover this eventuality, but I once attended a conference on climate change where a prominent epidemiologist disavowed any knowledge of human behaviour, stating ‘I am not a social scientist.’ He went on to argue that the health of future Aboriginal Australians would be seriously harmed by climate change — ignoring the rather obvious point that the impacts of future climates projected by models rested on emissions scenarios that assumed massive increases in wealth; apparently none of this would find its way to Aboriginal communities, which would continue to wallow in squalor.
Which brings us to the current pandemic with the novel coronavirus, or COVID-19. The government policy response has seen some sensible measures adopted, especially in shutting down borders and requiring a degree of ‘social distancing’ in an effort to flatten the curve of infections sufficiently to allow the health system to cope. But has the National Cabinet gone too far?