I think we've tried the "we could make education better by spending more on it" method. Based on the current state of public education, I don't know that this approach has been proven correct.
1. Citations for the claim that we are spending more for the same results would be productive... but I believe it.
2. I believe the problem is that the extra money is not going to proven-effective programs and teachers. There is some question to me whether anything is proven effective... in spite of whatever you read in books written for teachers.
3. The parent comment is pretty nihilistic. Try to propose something that you think might improve the status quo. (E.g., the comments about the highest impact of extra spending being in social services instead.)