On the road to Paris, new OECD boss Mathias Cormann saw the light – as filtered through the increasingly carbonated atmosphere he (now) urges the world’s richest nations to address.

Ex-Nationals leader Mark Vaile keeps a lower profile. But he also has to manage the awkward juxtaposition of a career in Australian conservative politics followed by a second act in an altogether different realm. Though, in Vaile’s case, the dissonance isn’t entirely historic.