I wasn't specifically talking about nurses. The NHS pay bands are published and can be viewed on the web, and you will see that annual increments are usually based on gaining experience, and as people gain experience of course they are likely to take on more responsibility.
That is the norm in most jobs whether NHS or not.
A nurse with less than 2 years experience is probably on band5..earns around Ł25K a year. An experience sister could be double that an d in London maybe Ł60k.
Doctors are on a different set of 'clinical' pay rates.
And please don't get me wrong, Im not saying the pay is good or bad, whether 3% is fair or not, I'm just stating facts..ie many get additional annual increments as they gain experience.