That looks more like a good initial brainstorming effort than an actual plan.
Now you need to:
- Decide which position to take.
- Organise your ideas (how they fit together in body paragraphs).
Comment: I don't necessarily see the problem with the first negative point you listed. It seems to be part of the second point (buying unnecessary things). Perhaps you could discuss how advertising adds to costs, thereby leading to higher prices.
Student or Learner