In a nutshell, there is 0 reason for the for the FD to be on 90% of EMS calls. Fire should do fire, EMS should do EMS. For rough numbers, In a career system, tiered is generally the way to go, so you should have as many BLS ambulances as engines, and staffed ALS ambulances as ladders/rescues, with competent EMD screening, sending the appropriate level ambulance to the appropriate call. If you have a fire based EMS system, and you have more engines than ambulances yet the majority of your calls are EMS, than you're not allocating your resources appropriately based on the call volume.
Fire can be helpful to EMS on certain calls (cardiac arrests, rescues), when additional manpower or special equipment is needed, but if you have a properly staffed EMS system, you rarely need a first responder to stop the clock. ALS engines are stupid, a waste of money, and there is no evidence that they are actually beneficial. If you must have a first responder, downgrade them to BLS, make sure they are good at BLS, and have enough ALS ambulances that ALS can be started a few minutes after the engine arrives.
This also means having EMS as an independent 3rd service government entity, so they get all the government retirement benefits, and the government is responsible for it's operation, and funds it's operations like any other government department, not a private entity who is contracted to provide a service and all too often isn't given the funding to do the job well, and still make a profit.
SoCal is apparently a very special area to work in.... if you are with the FD, you get paid well and know everything, if your on the ambulance, you are a taxi service. not really something that appeals to me, but they have a glutton of providers who are just hoping and praying they get that golden ticket and get hired by the FD. But if you really want to do EMS, it's best to get out of SoCal.
That wasn't too horrible, was it
@VentMonkey?