Purpose and passion.  Retention and motivation of your workforce comes back to this and at The Strategist Group we not only support getting the "right people on the bus" (Good to Great) but the HR programs and retention strategies to engage people when they are there. 

While we acknowledge all kudos to Atlassian, a fantastic and innovative Australian company with some exciting human resources and resourcing strategies, we would note that the innovation practice of 'free time' has been commonplace at Google and resulted in many of their developments.