Mate a totally brilliant plan!
And following on from the Lead agency model - there is some other areas of duplication that could be removed as well, at least at the higher levels.
Congratulations you have shown us a future that will deliver best practice service delivery to the state at a price it can afford.
Now for the bad news:-
There would be a need to remove the politics (internal & external)out of it!
There would also be a need for individuals/ groups to forget the past and move forward, can this be done? Can the services handle the shock without compromising service delivery?
There would need to be an honest Risk assessment, capability audit & if required additional funding accross the whole state - not just Adelaide.
Here is a bit out of the QLD Act that deals with Combined "Emergency Service Units"
The functions of an ES unit are any of the following functions the
chief executive considers appropriate for the unit—
(a) an SES function;
(b) fire fighting or fire prevention.
(2) To decide the functions of an ES unit, the chief executive must have
regard to the following—
(a) the needs of the community in the emergency service area for the
unit;
(b) whether the members of the unit have the abilities to competently
perform the functions;
(c) the resources available to the unit;
(d) whether the unit can appropriately maintain the equipment
necessary for the unit to perform the functions.
If we are looking at such a major change to the Fire services, then something like the above should be considered at the same time.
Having spent time reading the QLD Act it has opened my eyes, to the future which as long as due consideration to the whole state & all the different emergergencies (not just fire) is given then it could be a good thing
cheers