Anyone who thinks it's smart to cut immigration is sentencing Australia to poverty.

The proliferation of outlets that digital technology has enabled has itself contributed to the changing nature of what we regard as 'news' and the way in which many citizens perceive politics.

What we're seeing at the moment is people being radicalised or adopting Islamist, murderous Islamist ideology very, very quickly so that you have people that are not on the counterterrorism radar screen who then often, as a result of mental illness, will then attach themselves to this murderous ideology and then act very quickly.

I love radio - its immediacy and especially its intimacy... it is part of your life, whispering into your ear. You can't see it, but equally importantly it can't see you.

The royal commissions are successful and effective when they have a focused terms of reference and can do the job quickly and report. And then action can be taken.

There is a tendency to try to dumb everything down and turn everything into a one-paragraph press release or even less, just a slogan.

On balance, after weighing the arguments, I believe that the time has come for Australia to create a new sovereign wealth fund.