Mike Cannon-Brookes — co-founder and chief executive officer of enterprise software business Atlassian and Australia’s fifth-richest person with a $13.2 billion fortune — is suffering a "deep internal conflict” about taking on the trappings of the billionaire lifestyle.

In a posting on LinkedIn recently, he poured out his heart about reconciling his convictions as a climate activist with his actions as a tech boss — in particular, Atlassian’s decision to sponsor a Formula One team and his purchase of a Bombardier 7500 private jet.

"There’s a couple of reasons I’ve purchased a plane,” he sighed. "Personal security is the primary reason (an unfortunate reality of my world), but also so I can run a global business from Australia and still be a constantly present dad.”