+3
Certain units and hospitals do have more "just in case" nurses hanging around to meet nurse to patient ratios, but you can't generalize it to every unit and hospital system. There are state and nursing union rules about the ratios and so it varies from hospital to hospital.
Sometimes I shudder to think of all the nurses that are paid (albeit a slightly lower wage) to sit at home on call just in case patient census goes up and they need more nurses; how much money it must cost the system....
I'm curious to know why you think the hospital is bleeding money keeping nurses "on call".
You won't find any nurses in the hospital hanging out "on the clock" just in case the census changes. If your unit has available beds, you will have nurses that are "open for admit" meaning that they are taking care of patients already but are available to take an admission. And no you don't staff for every single available bed in your unit, but you do take into account the number of admissions you can reasonably expect, as well as the transfers/discharges that you expect. These operations are designed to afford flexibility. It doesn't always work perfectly.
There are very few instances/departments in which a nurse would need to be "on call" That would be OR, cathlab, maybe L&D. And from what I've heard, the pay isn't as good as you think (i.e. nowhere near "albeit a slightly lower wage").
I work in a neuro ICU and a trauma ICU (one staff pool staffs both). It's pretty sensitive to census shifts. None of us is ever on call. If the census is low, we either get floated to the cardiopulmonary ICU or one of the stepdown units or we get cancelled. If we are short staffed on a shift, the staffing office and the charge nurse start making phone calls trying to get someone to come in on their day off. And no, there is no bonus, no incentive beyond regular wages for coming in extra (unless it puts you over 40 h/wk).
If you care about patient care standards/safety/quality, it would make you shudder to think that you could have several traumas, STEMIs, women in transitional labor and find yourself without enough nurses for these patients. Being understaffed is not a valid excuse for substandard care and resulting poor outcomes.
Apparently there are important financial implications when the hospital is on "diversion" (which admittedly I don't know the details) such that the powers that be do what they can to avoid the necessity of being on diversion.
Since nurse-patient ratios seem to be a topic that you're very concerned about (an assumption on my part since you took the time to post and the visceral reaction you described (i.e. shudder)), there is plenty of literature that addresses the relationship between ratios and patient mortality, length of stay, nosocomial infection, costs, etc. Since you so freely express your opinion on nursing staffing levels, I'm curious to know what data supports it.