At some schools, work study only goes to those students with financial need. The good news is that in many college towns there are ample jobs at town businesses, or babysitting, and the like. Often times, students can make more money at off campus jobs and/or non-work study jobs on campus (if the school has those). Rule of thumb is to work no more than 10 hours per week during college.
Did you run the NPC on the school’s website before applying? Does the aid offer match that estimate?
This was true at both my kids’ LACs. One of them raised the salary in food service to $19/hour (for both towns people and students) and still struggled to fill jobs.