We shouldn't confuse aspiration with environmental constraints. Just because some company says their product, XYZ, was designed to change the world and increase IQ doesn't mean you can go around stating that XYZ changed the world and increased IQ, or analyzing the various characteristics of the product solely in terms of the claims. Rather, in reality almost everything of substance about such a product follows from exogenous constraints--cost, feasibility, etc.

To explain the seemingly arbitrary and stifling demands of a typical Prussian-style universal education system, the obvious place to look first would be cost--instructors, facilities, organization, etc.

Also, the beginning of industrialization coincided with the end of serfdom in much of Europe. Were capitalists trying to create and exploit compliant workers, or were they trying to create workers, period? That is, there were no workers beforehand, just serfs or recently emancipated serfs, depending on territory. Social reforms were so wildly successful in Prussia that they swept the Western world, even places like the U.S. where industrialization (but not universal education) was already well under way. Was that because it produced virtuous, Christian workers, or just because it was efficient at improving basic literacy?