If you are a neoliberal and see education as nothing but a waste of money and resources, with its only purpose job training, you don't want a workforce that knows anything about the arts and sciences and certainly NOTHING about the reviled social sciences. It's all about limiting upward mobility so that the filthy rich can keep their exclusivity intact.
It's also a way for the gangsters to pilfer the public treasury for profit.
“Imagine,” said a public school teacher in New York City, who asked that I not use his name, “going to work each day knowing a great deal of what you are doing is fraudulent, knowing in no way are you preparing your students for life in an ever more brutal world, knowing that if you don’t continue along your scripted test prep course and indeed get better at it you will be out of a job. Up until very recently, the principal of a school was something like the conductor of an orchestra: a person who had deep experience and knowledge of the part and place of every member and every instrument. In the past 10 years we’ve had the emergence of both [Mayor] Mike Bloomberg’s Leadership Academy and Eli Broad’s Superintendents Academy, both created exclusively to produce instant principals and superintendents who model themselves after CEOs. How is this kind of thing even legal? How are such ‘academies’ accredited? What quality of leader needs a ‘leadership academy’? What kind of society would allow such people to run their children’s schools? The high-stakes tests may be worthless as pedagogy but they are a brilliant mechanism for undermining the school systems, instilling fear and creating a rationale for corporate takeover. There is something grotesque about the fact the education reform is being led not by educators but by financers and speculators and billionaires.”
It's all completely illegal but is being dictated by our lawbreaking president and his secretary of education, both of whom are owned by these billionaires. It's easier for the billionaires to control the White House and Congress than it is to control every single state legislature or school district.