Competition in the free market is best for everyone. Except when it's not.

In the time of COVID-19, it most definitely is not.

Rod Sims is chairman of the Australian Competition and Consumer Commission.

He says that when we are fighting a pandemic-induced war, the economy is flipped on its head.

We must all work together to supply what people need, even if it involves co-operating with rival companies.

But once all parties have sat at the same table, how do we prevent collusion after the 'war' is over?