It sounds like you might be getting hung up on the “recommend a better solution” idea, which isn’t a requirement — it’s just one way to end an essay. Instead, you might end by noting the sense of satisfaction one feels when knowing that they paid for their education (perhaps tying this to your own experience, if you are currently paying tuition) or another benefit of tuition — this is a good opportunity to mention something beneficial that perhaps wasn’t “meaty” enough to be one of the main points of your argument.
Plan - Now you have to organise the 'mess' that was your brainstorm into a well structured essay. Decide whether the question is asking for a thematic approach, or chronological. Is it asking for causes to be evaluated or for a discussion of two sides of an argument? Once you have a general approach, you need to decide what each paragraph is going to include. Look at your brainstorm and begin to group ideas, include any more relevant factors or points that may come to you as you are planning. Start to order the paragraphs and try to see natural links between points or paragraphs to help the flow of the essay.