A similar issue comes up in other domains too. For example, St John Ambulance Australia provides first aid for public events. Most of the duties are covered by

A similar issue comes up in other domains too. For example, St John Ambulance Australia provides first aid for public events. Most of the duties are covered by volunteer first aiders. However if they cannot meet demand (which is often the case with mid-week events where volunteers are otherwise engaged with their jobs) then there is a commercial arm which steps in to cover the event. The problem is when you have commercial and volunteers together at the same event, and some volunteers may think: "Hey, screw this, why am I volunteering my time, when the guy next to me is getting paid a decent hourly wage to do exactly the same thing?"