A "four year promise" is a promise that institution makes for the duration of a client's stay; once the client has left the institution, the promise is no longer
heeded.
The phrase originates in the relationships between college administrators and students, which often relies on the
student body's short attention span (4 years, or often less) to on-going, systemic issues. This strategy can be used by colleges to make nominal concessions in one policy 'battle,' while patiently waiting for institutional longevity & momentum to win the policy 'war,' often as a result of the passing interest of the student body.
While a "four year promise" refers to an administration's actions, a "
four year memory" may refer to the student body's (non) action.
"I thought the school
promised to
fund that program for the next
20 years. What happened?!"
"Oh, come on - that was just a four year promise!"