There is no sense in spending billions of dollars trying to guarantee the impossible – that the lights will always stay on. But this has not stopped government ministers, corporate executives and numerous commentators from pretending a particular source of power will always keep the lights on. Nor has it stopped journalists from repeatedly asking ministers to guarantee "the lights will stay on" in future. It might be tempting to claim that everyone understands it is impossible to deliver these promises, but much of the current debate is conducted on the premise that they don't.
Keeping lights on can't be guaranteed | AFR