As Tom said, all Governments are going to do shady and unethical things, with or without legal authority.
Using a Section 31 type Organization, it allows you deniability, and the opportunity to be outraged and declare why things like that aren't acceptable.
Without a Section 31 Organization, you end up with laws being changed or twisted to legally allow Waterboarding, indefinite detention without trial, The President being able to declare someone a Terrorist and the ability to invade another Sovereign Nation with Predator Drones to execute that person, all without a Trial, or any oversight. Is it really better to allow it to be legally acceptable (And therefore likely to become more commonplace), or is it better to keep it on the down low in back rooms, and not alllow it to become Publicly Acceptable?
Using a Section 31 type Organization, it allows you deniability, and the opportunity to be outraged and declare why things like that aren't acceptable.
Without a Section 31 Organization, you end up with laws being changed or twisted to legally allow Waterboarding, indefinite detention without trial, The President being able to declare someone a Terrorist and the ability to invade another Sovereign Nation with Predator Drones to execute that person, all without a Trial, or any oversight. Is it really better to allow it to be legally acceptable (And therefore likely to become more commonplace), or is it better to keep it on the down low in back rooms, and not alllow it to become Publicly Acceptable?