The basic truth is that IFT pays the bills and is how most private companies stay afloat. So financially it makes a lot more sense to have EMTs running transfters between 911 calls.
Also I can't believe that people think most IFTs need a medic. When I was on the truck most of the IFTs we were doing were "80 yo man who is normally in a wheel chair needs to get to his doctor's appointment and back." Most of these patients medically stable, but for some reason they don't have the mobility to physically walk out and get in a cab.
Sure there are the sicker people who are on lines, pressors etc. But most an EMT can handle. And if the stable patient who is going to the doctor suddenly codes, I'd much rather have an EMT in the back than an LPN whose code experience is "go call the doctor."
How much "medicine" is the EMT taught? Basic first aid is not adequate since many of these patients require little to no first aid. A CNA is also better trained to move some of the medical needs patients. They are familiar with some of the disease processes and the special care they may require. If the EMTs at least has some of the training that a CNA gets, then they might be better qualified to even take some of these patients to and from the doctors' offices. CNAs also have CPR cards and most of our hospital CNAs have done CPR many, many more times than some of the EMTs working 911 calls. The training of the EMT is just not adequate or appropriate for medical patients.
I'm also glad you mentioned the LPN. LPNs have more education and "hours of training" than most U.S. Paramedics. For a long time they did work codes in the EDs, ICUs and L&Ds when it took awhile for doctors to arrive and they still continued to work the code. Nobody just leaves the patient when a doctor arrives. But, healthcare has progressed and the 1 year LPN is no longer found in these areas. Yet, we still allow 3 month wonder Paramedics on the streets. What's with that? What does EMS continue to stand behind low standards when every other profession is raising theirs.