This has led to is a rise in PAs and ARNPs for primary care, and scary things like CRNAs asking MDs for sign offs without a supervising anesthesiologist.
Is there a reason other than fear to think that CRNAs are ineffective at their jobs?
They need a supervising physician, which should be an anesthesiologist. Surgical MDs do not have the same qualifications to sign off on their orders. The liability with CRNAs flows to the supervising physician, so most MDs tend to be very uncomfortable working with only CRNAs.
Not quite the question-- the real question is why would they be effective at the jobs of others? Doctors have 10-15 years of training, there's a reason for that.