Perhaps you can ask Prof. Keen his thoughts on the Australian governments concerted drive to increase population density (via immigration), as a way of improving our flagging economy. If he is willing, ask him what he thinks Australia should be doing to dodge what looks like a looming global recession.
Ditto re immigration induced population growth. I am most concerned at the huge cost of infrastructure required to sustain it. This has to be funded by the States and yet the Federal Govt. controls immigration. Not to mention the massive cost of climate change that doesn't appear to be measured in dollar terms at this point.