What's the difference between university admins and fast food franchise owners? Ha, trick question! There is no difference.
Starting in January 2014, any employee working 30 hours or more per week will be considered a full-time faculty member and will be entitled to health insurance through an employer under new federal rules, with an exception for certain small businesses. So far, several schools have cut adjuncts' hours to avoid the requirement and save cash. Matt Williams, vice president of New Faculty Majority, a group that advocates for collective bargaining rights of adjunct instructors and professors, told The Huffington Post in November he expects this type of action to happen more often.
H/T "Cynic" in comments here.