This scandal happened 10+ years ago, and congress passed a law to address it. It's hard to argue that it was buried.

The worrying thing though is that all of the linked articles referred to this as a "cheating scandal", or as a failure of the tests to identify candidates. Only in the last week has it been reframed as a DEI problem.

is there a source for how the FAA evaluated the questionnaire ?

A great litmus test for BS is when you find more articles written in the past week about something that happened 10+ years ago and all the armchair experts come out of the woodwork. This issue was basically asked and answered, and in the time sense no one has done anything meaningful to fix the structural problems which is almost entirely that they do not pay enough for a job that is fairly life consuming. They cannot even get enough applicants now, so the unfairness in selection would be moot as it does not exist. We just saw past year a bill struck down to increase pay, and I think a few weeks ago in California controllers quit because they restructured contract to not pay COL.

Those are facts that are pertinent, and we should strive to use more critical thinking when analyzing situations.