I saw this a while ago and it really stuck with me. Below is the RSA's brilliant animation of Dan Pink's talk on the surprising truth about what drives us. It has lots of applicability to what happens in the NHS.
What motivates is not rewards and punishments, rather it is autonomy, mastery and purpose.
By thinking a bit differently about what motivates us, we can get the best out of ourselves and those around us in the NHS.
Have a watch, it's fantastic.