If you build it, it will get used. The system was justified in the name of "terrorism", and is getting used for white collar crime.
I wouldn't want to bet against it being used for other things as well. Such as to give prominent, connected politicians inside information on their opponents' campaigns.
Few years back there was wiretapping of government officials in Greece. It turned out that was used wiretapping interface of the phone switch. Presumably illegally, nobody was caught.
I wouldn't want to bet against it being used for other things as well. Such as to give prominent, connected politicians inside information on their opponents' campaigns.