You're absolutely right. Only one of the public servants appointed to manage the cycling parking rides a bike. This person was appointed (in paper only) to manage the municipality's Bicycle Office. But he hasn't accepted any responibility because this role is not in his contract.
I notice that Bert sent you the same advice to you regarding public servants using the bike. I like to advice for the incentives outlined in the European Mobility Week's "Handbook for Local Campaigners" (page 16 (http://www.mobilityweek.eu/fileadmin/files/Material_2014/Handbook_For_Local_Campaigners.pdf) in particular: "Set up a “parenting” scheme several weeks in advance, involving volunteer civil servants and an experienced bicycle user. The new “cyclist” would cycle to the workplace with his or her “parent” and the pair could then be interviewed about the experience (press release, newsletter, website) during the EMW"..
Kevin