All three of my primary Computer Science professors have left the college and are working for the public sector (read: goverment schools) now. That’s like being retired (not to be confused with “retarded”. Not just yet, at least) – shorter working day, much less load, and much better benefits.
I personally don’t feel like I could ever work like they are doing now, but I am much younger than they too. I wonder if my views on this particular issue will change with time.