[freakonom]

An answer that usually works:

Absolutely, because there have been no large scale terrorist attacks.

[jmadsen]

"Why are you waving that handkerchief?"

"Keeping the elephants away..."

You know the rest.

[vacri]

The thing is that they have been doing just fine with their current powers - there is no need to expand them. I have no doubt that actual terrorist plotting has been countered by ASIO, but I also have no doubt that ASIO clearly already have enough powers to do their job appropriately.

[Ygg2]

Implying that there is such a thing as just enough power.