Plan B has nothing to do with data or analysis but everything to do with the electoral cycle. Most of the population is quite happy with closed borders and the appearance of a strong government response. Look at the response to getting the vaccine now that there is an outbreak in Victoria. Two weeks ago very few were fronting up for the jab now fear of getting the disease is causing long queues. The next election is due next year well before October 2022. By then memories of closed borders and slow vaccine rollouts will be faded and the incumbent government will look like geniuses.