My D worked for a private medical agency for years and at times was treated atrociously by NHS staff because she was agency. Some of the tales she used to tell me were truly awful and I might add that I wouldn't have lasted because I'd have caused WW3.
I nearly wrote to the company saying how bad my D was being treated. I know you shouldn't tar all nurses with the same brush as I've worked with some brilliant ones, but the more militant amongst them wouldn't get my vote for 1% or any other sort of an increase .
Why should there be this animosity against agency workers whose job is as valuable as anyone else's, in fact in my D's case, the worst jobs were handed out so she more than earned what she got in pay. ? Her work covered both hospitals and nursing homes, some of which were well out of area !