Maybe my expectations are out of line but I'm trying to hire a part-time nanny right now to take care of my DC (DS 3 years and DD 4 months) and am using a nanny agency as I had hoped they would have some great, qualified candidates. So far none of the candidates I've seen have any professional childcare qualifications other than basic CPR training. Am I misguided in expecting some educational background in childcare e.g. courses taken in child psychology or education?
I had assumed that most professional nannies would have started out studying child development or education in some way. Am I being totally unrealistic? The candidates I've seen so far are more like babysitters than what I would expect for a professional nanny. That would be fine if I were paying babysitter rates but their salary broken down hourly is nearly double what an average babysitter would charge and there is the hefty agency fee on top too. None of the candidates I've seen seemed that interested in children either - one of them told me she was looking for nannying work because it pays well and she had a car loan to pay off!! 
It's my first time hiring anyone to take care of my children apart from a few 'date night' babysitters though maybe I'm just being unrealistic...?