If all the citizens have to do is say no and nothing changes then there is absolutely no reason why they would say anything at all. “Hey guys, all we have to do is say no we don’t want a paid ambulance service and that means we will still have an ambulance service”.They already do when they get billed for the ambulance ride. Do you seriously think they will accept being taxed for that too?
If you want resources in town you must pay for those resources. If you want resources but do not want to pay for them the answer should never be “let’s start a volunteer department”.
Until the citizens know for sure it is serious and what they will be loosing, there is no reason for them to do anything.