The other thing that people frequently overlook in this discussion is motivation. If you are paid a salary to show up 7-5 every day and do whatever cases the hospital brings you, you have no incentive to bust your butt to get cases done, be efficient, work on cost-saving measures, make systemic improvements, work with other departments, etc. If you are in PP, there are profits to be made and every time you crank to get through cases that such faster you get to go home earlier. The quest for efficiency aligns your goals with the surgeons (most of the time) and the hospital (again, most of the time). It is very common for PP groups that become employed (either by the hospital or an AMC) to see efficiency plummet. If peoples' salary/free time doesn't depend on it, people won't do it. Outside of intrinsic work ethic or pride in a job well done, there's no incentive for efficiency or even high-quality work. And intrinsic work ethic/pride in a job well done don't pay the bills. I'm very happy and professionally satisfied to be in a private practice where we've done a lot to make the whole system more efficient, and work hard throughout the day to get cases done expediently and well. It doesn't hurt that doing all that stuff pads my bottom line.