Don’t focus so much on the fact that the proposed solution won’t work. Instead, grant the premise: “Yes, X (poverty, unemployment, poor education) is a problem, you are right. We agree about that. But I think that your solution will do more harm than good. If you really want to solve Problem X, research has shown that we should [Y].”It gets more challenging when doing Y gets you some of good thing X but troubling consequence Z is also likely to follow.
The best you can do, perhaps, is to sigh, and try, and persevere.
That's all for February.