Jim O Callaghan , minister for justice actually does understand it and asked a pertinent question regarding ETF taxation a few years ago when he was a backbencher of Pascal Donohue the then minister for finance. Donohue gave a factually incorrect reply and was just spouting off a departmental reply he was given, his normal tactic is to waste time repeating the question asked rather than just starting with the actual response using up most of the time given without properly addressing the topic asked