Under the laws of the Regents, misconduct is grounds for discipline and even dismissal, whether or not a professor has tenure. Enforcement of University rules depends on effective procedures, and this subject merits further study. Productivity is generally not a problem among tenured faculty. Various aspects of the system work to insure this result. First, every faculty member is evaluated on a yearly basis.
Raises depend on merit evaluations, and unproductive people suffer economically.
Second, post-tenure review provides a signal that an award of tenure is not an invitation to relax. The system does not work perfectly, however, and improvements may be possible in the incentive structure, in ways that expectations are communicated to faculty, and in ways that productivity is reviewed. A stronger program of post-tenure review may be needed to put the handful of unproductive faculty back on track. No, it doesn't. Every faculty member is rated by the students in every course, and the results are provided to deans and department heads, who take them into account in making yearly decisions on raises and assignments.