Decline of Tenure Faculty

NY Times on the increase of adjunct faculty. Notice how poli sci is not include as a field that can benefit from adjuncts.
"Professors with tenure or who are on a tenure track are now a distinct minority on the country’s campuses, as the ranks of part-time instructors and professors hired on a contract have swelled, according to federal figures analyzed by the AAUP. Mark B. Rosenberg, chancellor of the State University System of Florida, said that part-timers can provide real-world experience to students and fill gaps in nursing, math, accounting and other disciplines with a shortage of qualified faculty. He also said the shift could come with costs. Adjuncts are less likely to have doctoral degrees, educators say. They also have less time to meet with students, and research suggests that students who take many courses with them are somewhat less likely to graduate."

Why to avoid non-Ph.D. adjuncts:
Not connected with the currents of research and scholarship in the fieldNo time to prepare classes
Not trained in the basics of the field
Letters of recommendation carry little weight
No time to help students
Little authority as a part time worker
Lack of support staff and TAs
Degrees represent little extra time in the classroom