One of the problems is that you have two types of nurses now obviously.
Travellers and employed. The ones that are employed don't get the wages they ought too and the others get higher wages than they ought to. Nurses that are without families, no local obligations and don't care about all the benefits like retirement etc take the traveler jobs. They normally leave employed positions to become travelers as their freedom and the pay and lifestyle attract them. However, the nurses that have husbands, homes, lives outside of work that require them to stay local, cannot take advantage of the traveler positions so you have a lot of discontentment. They don't blame their colleague for getting what they can when they can but as others have said, when they leave FT positions for travelling this then forces the hospitals to hire for that position. If they cannot, then they have to go back to the firms that have travelers and pay the fees and high wages. No nurses, no beds. No beds, no patients, no dollars.
So something has to be done. The hospitals could go a long way towards fixing it by paying the staff nurses that stay local the money the deserve for one. Make a benefit package that's hard to turn down. Pay back student loans. Offer bonuses for retention. Lots of options. Problem is, the hospitals are reluctant to reset the market in this way.
The other thing is that many nurses have now gone on 'to get my nurse practitioner' Fine. Problem is, there is a small market for those right now and with staff RNs there is a huge market. if the nurse lobby really wants to implement a change that would work to staff hospitals, they would severely curtail the numbers of NP schools and slots. They do not right now. These schools seem to have little in regard to standards for admission. Every single nurse I know has gotten into a program if they are willing to pay for it. I have never, one time, heard a nurse bemoan the admissions process and 'wonder if I will be able to get in' Unlike other medical advanced degree programs. Second, many if these are substandard online schools that poorly prepare one for an actual practice of medicine. So, we need less NPs and more RNs. Right now. As the market shifts, a shift in the model would be indicated, as it is in reverse, now.