"Carefully directed searches of large volumes of data also allow the security and intelligence agencies to identify patterns of activity that significantly narrows down the areas for investigation and allows them to prioritise intelligence leads."
This may be true.
That does not necessarily make it right.
"All citizens must wear a GPS Tag 24/7 so we can track who dumped that body we found". Somehow I don't see there being the same public support, despite that being the effective result of the proposed legislation.