Apparently, blue collar in the context of this article means paid by the hour. Obviously there are many nursing positions which are salaried.
Having worked both salary and hourly, I can tell you, I prefer hourly. Once you go salary, you are expected to work over and above, provide more revenue, or cover for staff absences, whatever...forget it! I went for an interview for a great CM job today and was told, we are very demanding, we will expect you to be here each day as long as it takes, it's not uncommon to have a nine hour day, if anyone leaves at 4:30, that is a miracle.
Then I called VNA to confirm my per diem days and rates and found out we got an huge increase to $30/hr weekdays and $36/hr weekends. I can bring home more than I did working 32 hours (yes every weekend tho) than I did working FT salary!
So I say, I'd rather be blue collar and free to choose my hours and days to work, than be a white collar slave to the rat race!