This is not about volunteering or reading to kids. It is about inequities in funding. Mom2twogirls gets it.
It is just plain improper for parents to fund a library teacher. That is part of a public school budget that needs to be publicly funded. This may require advocacy, and the same capable parents who contribute to pay for the library teacher could be advocating. In our state, parents aren’t even allowed to fund something like this; even for an ed foundation there are limits on what can be funded, and that includes faculty and staff positions, and capital improvements.
This is because these things are supposed to be publicly funded.
Once a group of parents does this, the government can then expect this expense to be covered by parents in the future. As I said, was say this happen with sports uniforms, bus fares and so on. Once parents paid, it never went back in the school budget.
I once spoke up at a meeting and suggested that in the long run it would be better to go without the music classes that were threatened by a tight school budget, than for parents to fund them. If parents funded them, we would never get them back on the public budget. If parents did not fund them, then the loss would be felt, advocacy would increase, and then over the long term the music classes would go back on the public budget.
This is about money and politics. The more wealthy parents do, the less the fed, state and especially local government will do.