No, it's not "OK," but in non-ideal situations the reality is you do what needs to be done. However, if there is a way to avoid multiple pt. transport, I think it should be avoided. If you're in the sticks with no other ambulances, then you may be stuck.
There is a possible justification for being a bit more risk tolerant during a single emergent situation....not so much for a systematic allowance of exposure risk simply to get grandma nunu and papa jack to the doctors without taking more than one crew out of service for dialysis runs.
Personally I'd much much rather see us go to forward facing crew seats with only room for one patient, but that's not reality in most places.
if both patients are stable, or one of the patients is stable and does not need your attention that often but the other patient does. Why take another rig Out of Service to take the stable patient? Can you not handle two patients in the back by yourself? If you have two critical patients I can understand not transporting 2 if your working IFT.
I know working 911, sometimes we use firefighters as drivers or a firefighter in the back.
Question about IFT: Why not call your supervisor or another coworker and have them meet you at the hospital so there is two in the back with the patients? Is that even possible?
I have never worked IFT. I have only worked 911, so maybe my thought process is different because of that fact.