There is no such thing like withdrawing when the Government no longer exists! In case of loss in Confidence Vote, the elected government cease to exist and a new government or a Caretaker government would be in place. The second is more likely given the situation and in that case, no policy level decision can be taken by a caretaker government. Any agreement by a caretaker government would be prima facie invalid and infructious and would not be enforceable. Whom are the Congress trying to fool anyway?