"So who governs what is the correct application and interpretation of data?"

Morozov doesn't worry about the correct application of data but, from what I understood reading the link, is more worried about this:

"Morozov fears a future in which such “intuitive knowledge” about how to deploy resources is overruled by algorithms that can work only with hard data and can’t, of course, account for the data they don’t have."

It could be argued that decisions based on "intuitive knowledge" without any data are as biased as the one's based on only data.