This situation looks like it had arisen from policy however, and I would imagine that's why the Minister is trying to dodge the question.
and that is exactly why they shouldn't be allowed to get away with being 'economical with the truth' (let's just call it lying) and, what is worse, basically accusing the whistle-blower of being incorrect (let's just call it lying).
I'm not a fan of politicians, irrelevant of their party, however, Ms Moon has taken the trouble to pursue this further, for that she has my thanks.