Well for many students, the time they have to spend studying leave little time for anythign else besides rest. However, this si not a bad idea, I guess with some good use of time maybe a part time job could be the way to go.
part-time job may sevrve as a good opportunity for stuents to accumulate some experience for future jobs and help them to become more independent if they can manage their time well. after all, for students, study shall be the first priority.