I'll take some blame for posting from my mobile which may have caused some of your reading comprehension issues.
Never blamed the teachers.
Never said anything about anyone getting rich.
Adminstrators make decisions based on the specific needs for that school/district. For cash strapped districts, sending the students to an outsourced program means less money for the school. So instead of losing the money, they will cobble together an in-house program just to keep the funding. There are some schools which change from in-house to outsourced every couple of years as a result of ths cobbled approach. For a student with special needs, the lack of consistency doesn't help one bit.
For some schools without funding problems, and since these are often times in well-to-do areas, administators don't want the parents to think their children are co-mingled with special needs kids. So they decide the outsourced method is the way to go. Out of sight, out of mind. This is especially true with behavior disorder kids. The last thing they want are parents finding out there are repeated problems as a result of the "bad" kids. The parents pay good tax money for their kid to be in a school without problem kids (actual comment from one administrator).
No reading comprehension issues. You said schools. A school is a building. It is the people who make decisions... i.e. the teachers and administrators. So when you say schools do something, what you mean (whether you intend it or not) is that the people in the school do it.
They may "cobble" together a program because they are required by law to provide a program to serve that kid or find that student an alternative placement. There may be some who "cobble" together a program to serve that child due to budgetary constraints. But what is the alternative? If there isn't money to tuition out a student, would you prefer they ran in the red?? And what if there isn't an alternative program nearby to send students? In the metro area (Ames and Des Moines), name the programs. You can count them on one hand.
And actually many large districts that have the money to create an alternative program in-house have one. They don't send them somewhere else.
Need to get your facts in order.