Recently a good friend of mine was promoted in a LO-CO. This paticular lo-co has a leaderboard in their operations department with the rankings of the most fuel efficeint captains. I think this is deplorable and amounts to little else other than pressure on crews who wish to carry above minimum flight plan fuel on any given occasion.
Some of the "advice" my friend was given during his command training in realtion to fuel, and delays (in the London TMA in paticular) was to declare a medical emergency if things were looking iffy, on the basis that such declarations are always granted and rarely ever followed up. On the other hand, PANs and Maydays are.