Educating children costs money. There is no better investment. When you have a child, you impose a cost on other people. The more children you have, the more you raise the tax burden. If you're grown up enough to have a child, you should be grown up enough to shoulder a large share of that child's education.
Rich people have more money than poor people.
Taking a hundred bucks from a rich family causes much less pain than taking it from a poor family. I'm sure it's possible to transform these difficult facts into a fair formula for assessing each other to support good schools for every child. I expect Vermonters to call on their deepest wisdom and show us the way.