We cannot neglect the direct economic impact of the enlarged school system.  Not only does the postponement of the school-leaving age limit the growth of recognized unemployment, but it also furnishes employment for a considerable mass of teachers, administrators, construction and service workers, et. Moreover, education has become an immensely profitable area of capital accumulation for the construction industry, for suppliers of all sorts, and for a host of subsidiary enterprises.  For all these reasons--which have nothing to do with either education or occupational training--it is difficult to imagine United States society without its immense "educational" structure, and in fact, as has been seen in recent years, the closing of even a single segment of the schools for a period of weeks is enough to create a social crisis in the city in which it happens (304).