actually the Wikipedia article itself doesn't support your statement. Even if you take for granted there are some other explanations that contribute to the cost

actually the Wikipedia article itself doesn't support your statement. Even if you take for granted there are some other explanations that contribute to the cost rise, administrative overhead is clearly a big factor and that's the issue that can be addressed and he's tackling, not e.g., the relative difference in productivity of educators and everyone else which is a questionable facto.