Look, once you say the authorities can do anything outside of the legal loop (and thus the rule of law), and even more so when you specifically say its in emergency situations with no time to get in the loop, you have no way of really make sure that the authorities and/or the people who make them up and work for them won't abuse this. You are effectively saying that when someone thinks it's an emergency, they can forget about the basic principles of democracy and go ahead and be an inhumane monster, torturing, killing, whatever. They'll later plead that they thought they had to do what they had to do. The message has to be absolutely clear: the authorities can do exactly what the laws say they have to, and cannot do anything else. They must always act completely within the democratic legal system, no matter what. It's not a question of a lot of lives vs. a bit of pain. It's a question of either losing some lives or losing democracy. Democracy without Rule of Law is nothing.