Why do academics work so much?

Recently a Forbes article claimed that being an academic was the least stressful job of 2013. However, a storm of protest on social media forced the author to add an addendum acknowledging that this probably wasn’t the case. In fact academics work a a lot and that work tends to intensify in the so called ‘down time': January here in Australia and July in the North of the world. Freed somewhat from the distraction of emails and the responsibility of caring for students, us academics inevitably find ourselves not at rest but facing the deep end of the ‘to do’ list.