Well maybe we shouldnt be paying schools the same for disabled and average students to begin with.
Besides, it is pretty said that the best counter argument against charter schools is that parents will take their fair share of funding and use it to buy a much better education for their children.
I believe that most school systems do get more money for disabled kids. But kids that do their homework, pay attention in class, etc. cost a lot less to educate than a kid who isn't really interested in learning--even without any disabilities.
To your point about charter schools, there is a strong argument to be made that when parents have a choice where there kids go, public schools will have to make sure they are providing more academic opportunities if they don't want to risk losing the academically minded families (and their money). That seems like it would be a good thing for everyone.
Besides, it is pretty said that the best counter argument against charter schools is that parents will take their fair share of funding and use it to buy a much better education for their children.