In the past week I've had two conversations closely related to the Paula Principle, and to each other, in rather unlikely settings.   Both dealt with the issue of whether professional occupations such as lawyers and surveyors needed to require people to work 12-14 hours days in order to make progress up the professional ladder. Nigel plays baritone sax in the the band where I also play (the South London Jazz Orchestra, since you ask, see www.slcm.org.uk).   We were waiting for our gig to kick off in a pub in Tulse Hill on a rather damp Sunday afternoon recently, and so started chatting about non-band things.   Nigel has…