I can only comment on the overall question you posed on how to answer the supplement without being hypothetical or "faked." You would not be afoul of instructions by describing "
the type of issue I am interested in aiming my studies and practice toward." Caveat: I am unfamiliar with the terms and constructs used in social work studies.
1. Describe a social problem. Assuming you have the power and resources at your disposal, what would you recommend for intervention and/or social change to address the social problem?
To me, this asks you to present a personal example of your choice (like a "case study") to show how you think and what you are like as a person. If you prefer not to be hypothetical, come up with a meaningful experience in the past where you wanted to intervene to address a social problem. This gives you the opportunity to present issues that are important to you, bring out your values and passion for social work, as well as any other vital personal aspects that you want the AO to know. Don't forget to structure the case with solid analysis and actionable, practical recommendations for solutions.
2. Describe how your personal and intellectual qualifications, past human service experience and/or future goals are relevant
While the application asks for your grades, college coursework and work experience elsewhere, this is where you personalize your c.v., highlight the most impressive parts, draw attention to your strengths. Or simply recap why social work is your chosen mission/goal, why your "
interests are in addressing the varied psychosocial issues experienced by a certain population and not in systematically addressing large societal issues"