Hi Klosterman,
Don't know about that. EU ops are pretty simple, in the planning phase you have to have taxi, trip, alt final reserve and 3 or 5 % extra, depending on availability of an enroute alternate or instead of the 3% a statistically derived amount of fuel approved by the authorities. Anything on top of that is up to the commander. In my company there is absolutely no questioning if a commander decides to take more, however they do keep statistics on that too, just for learning purposes for the commander. You can acces where you fall percentage wise amongst your college's when it comes to ordering extra fuel.
Things are monitored pretty closely by the union in this regard that you are not harassed by the company about your decision making. I've yet to hear from anyone being questioned about it.