The resort to functionalism is a tad premature. While there are programs out there actively recruiting wannabees, my experience at UConn and the rumor/whine mill over the years has the opposite operating. Since the low point in the early 80s, faculty in sociology have been realistic, to put it mildly, about the career prospects of their students. The programs keep admitting wannabees in part because no one seriously wants to eliminate graduate programs or because graduate work is valued in terms other than economic reward - that medieval apppreciation for scholarship that is oblivious to the spectre of starvation. I don't think the labor discipline thing is at work. That would require some real world expertise and finesse that I find lacking among academics.