Tott,
Your outfit has had far more fatal accidents with a single crewed aircraft than it has a two crew aircraft. If my memory serves me correctly....your outfit has had exactly one fatal accident in a two crewed aircraft but has had many single pilot fatal accidents. I would suggest SPIFR is fine up to the point something goes wrong...at which point a very busy pilot gets really busy. As long as George is driving and the single pilot is acting as a conductor then all is fine....it is when the conductor becomes the driver, communicator, approach plate finder, navigator, and trying to cope with the problem(s) is when that second pilot pays off in spades.
Granted, your company operates very few two pilot crewed helicopters and the majority of the aircraft are single pilot crewed but I would suggest a well coordinated crew with a well trained and experienced second pilot would be much safer than flying SPIFR. That being said....things happen in a two pilot crewed aircraft as well....as the two 76 accidents show us....one with PHI EMS and the ERA GOM crash.
The question we need to answer is how many lives do we sacrifice for economy of operation.
Just what is a human life worth in the EMS business or in the Gulf of Mexico offshore oil business?