If you think this is partisan David Eggen went after the CBE in 2017 because their school fees were significantly higher than the Catholic board among other things
Baired almost cut and paste his 2020 article from this one in 2017
https://www.google.ca/amp/s/calgaryh...bfba322e2/amp/
Again none of the other major boards were investigated. Consecutive governments of opposite political leanings have had concerns. Apologies for the editorially frothing Baired article as opposed to real news.