GI RN pay scales and on call staffing concerns

The more I hear about other hospitals, the more disgusted I am that I did take a pay cut. Being in the GI lab comes with huge liabilities/ responsibilties. At our facility we sedate for colons, EGDs, EUS, ERCP, liver biopsy, bronchoscopy, PEGS etc.... Some of the longer procedures (1-2 hours) can require very high doses of sedative. In our exam rooms, we currently are usually the only ones in the room with the doc. We are supposed to call for help if needed to assist with polypectomies/ biopsies...etc. But on call....we are on our own. Very Scary! These are usually the chronic patients that come in with a variceal bleed....that need higher doses of meds and are far from cooperative. Its alot of responsibilty to sedate, maintain airway/ vitals, and assist the doctor. I also have many years experience as a critical care RN. I have never felt that I should be paid more than a floor nurse (each have there own stresses)....but to be paid less is just downright insulting. I just wanted to make sure that this was not "normal"....I was told it was because of working less weekends....less holidays....and that the hospital was trying to retain RN's at the bedside.