I think that the proportion of people who have to rent for their entire lives will increase. And that's not so bad. I mean, it's not the end of the world. A lot of people in Europe and everywhere, they rent all the time.
Kohler says continuing to make suburbs more densely populated can't be the only solution and Australia should look at better transport to regional cities:
What's required is better transport infrastructure through the regional centres. So fast trains to regional towns like Bathurst and Newcastle and not just fast trains between Melbourne and Sydney, but fast trains between Melbourne and Bendigo and Geelong.
There are a lot of new suburbs going up around Geelong. So a lot of housing is being built there. [But] there's a limit to what you can do there, because it's hard to commute to Melbourne.
On trying to recruit skilled tradespeople from abroad, Kohler points to the problem of migrants not having their trade qualifications recognised: