Is this intern counting group therapy patients and hours? On my VA internship, my caseload could vary from 12-18 individual cases, but I also had intakes (about 2-3 per week, but not consistently each week) who I followed until they were scheduled with their provider, and I ran 3 groups per 2 rotations (each group had from 5-15 patients). So even if I counted all the cases that I was privy to and individuals who were 'treated' or assessed, it still wouldn't be 60 clients....maybe 40 max.
I agree with smalltownpsych, we had weekly didactics, multidisciplinary meetings, weekly clinical case presentations, and group + individual supervision. I can't imagine internship being what equates to 'free labor,' with minimal benefit to the trainee. Sure, building stamina is part of the deal, too. But, something is suspect with this intern's account of "60 clients," and seems like an egregious outlier.
Edit: OP, are you referencing what a clinical psych intern does compared to what an MSW intern does? Because perhaps, the MSW intern has more clients on their caseload, as some of it is 'checking in' and case management. Psych interns do the same, but we're also delivering a service - such as whatever appropriate clinical intervention. I have heard that social workers have huge caseloads. Perhaps someone out there who is a Social Worker can shine some light on this point.