The arrival of academisation really marked a step up in the ascent of the role of business in the education sphere. Businesses came to run schools.
Now, a rudimentary bit of education should make clear to any student (or politician) that business does not get involved in anything other than to make a profit. The common good has very little role to play for the business.
So the academy model has been used by businesses across the country to get into education and very nicely have many of them done out of it. The schools are taken out of local authority regulation and handed over to business. This often sees the teachers treated as commodities to be disposed of at will. Those at the top of academy trusts reward themselves handsomely, often to the detriment of the teaching staff.