I'm just a masters student who wants to attend medical school in the near future, but I went to nursing school and saw what they're "teaching" there. I don't like saying it, but many nursing faculty and administrators harbor militant and occasionally hostile attitudes/opinions of doctors. I get along well with most nurses, and enjoy the practice of nursing, too.
But, I would be lying if I said that they don't want more money, and have built up resentments against physicians due to what they believe is a perpetuated patriarchy within medicine's culture that has leveraged inequities against women in the workplace. They think that this manifests as glass ceilings, sexual harassment, and discrimination. Many lectures I attended in nursing school, and many things nurses said to me follow this school of thought.
Really, though, the bigger issue with nurses, and what they're most unwilling to look at, is the fact that many (women, especially) entering nursing haven't pursued rigorous science majors, or are vocationally minded and/or not that smart to begin with, etc etc, and because of this, they don't have the educational backgrounds or skills to pursue higher paying fields. That's it.
Nursing unions should focus more on outreach toward underrepresented groups (men, minorities), on increasing the scientific rigor of prerequisites and in the coursework, itself, and addressing nursing faculty shortages (that fill those spots with real world flunkies); it is also known and well published that nursing academia is more negative and caustic than any other academic field (in nursing academics, the popular opinion is that there is a lot of bullying, "evidence based" pseudoscience, non-collegiality, and so on... google it to learn more, it's pretty shocking).
Added to which there are hordes of girls that did junk majors like human development, or in one way or another screwed themselves out of the premed track, or don't have an interest in going into competitive fields like sales, business, what have you and are kind of floundering. In these ways, nursing has become an easy fallback. Nursing unions should focus on addressing issues in these areas before pushing for expanded scopes of practice and inflating their NANDA diagnosis list to step on primary care doctor's toes. What nursing union's efforts tell me is that they are only trying to increase their pay at others expense. It's a cheap tactic that masks a larger problem, and stuffing giblet headed nurses into roles where they infringe on physician's prescriptive authority and medical decision making will never help solve it.
Long story short, I wanted to become a CRNA, but didn't feel prepared to manage complex cases with the science background I had at the time. I dropped out of nursing school with a 4.0 GPA after 1 year of a 3 year program; as I prepared to leave nursing school, I worked and built up money (bombed my final semester, lol), then jumped ship. I transferred to UCLA for a biochemistry degree and now I'm doing a pharmacology and toxicology masters at UCD.