According to Malcom Harris writing in n+1:
“And while the proportion of tenure-track teaching faculty has dwindled, the number of managers has skyrocketed in both relative and absolute terms. If current trends continue, the Department of Education estimates that by 2014 there will be more administrators than instructors at American four-year nonprofit colleges. A bigger administration also consumes a larger portion of available funds, so it’s unsurprising that budget shares for instruction and student services have dipped over the past fifteen years.”