Right, it's generally the case that the schools that comply with ADA and IDEA are supposed to get extra funding in order to assist students who have special needs, like access to speech pathologists or medical professionals with training in the issues faced by a student. It's also, in part, meant to give teachers a financial incentive to take on special education students.

The extra funding isn't the issue by itself. It's the fact that schools make it far too easy to skim off the top and get away with it without involving a courtroom.