According to an acquaintance who lives in Israel, their method of carry is mandated by Israeli law. Semi-auto pistols (the most common sidearm) are carred in C-3; Magazine inserted, chamber empty, safety off.
Three reasons exist for this policy.
1. Prevention of AD/ND's, especially in high density cities.
2. Muggings & robberies are surprisingly few (guns are open carry)
3. In the event of a shooting event, any unarmed Israeli can pick up the sidearm of an armed Israeli who is down, rack the slide and fire. He does not have to figure out the safety mechanism if he is unfamilar with the model. This policy works well, too.
I don't know beans about civil law in Oz, but you might be able to open some civil liability against the employer by sending a letter outlining the hazards of a guard carrying a money bag and trying to chamber a round when attacked. At the very least, he might spring for some Level II vests.