The recent vote at the UN to allow Saudi Arabia on women rights council shed light onto something else: country votes are secret. Apparently, the only way wikileaks found to ask for the vote Sweden casted was to issue a reward for documents on this vote. The method used suggests that these would be acquired illegally, and that legal action would not lead anywhere.
What is the justification for the secret ballot of countries ? Why use it only for some UN votes, not all or none of them ?