The Agencies require access to communications data – in certain tightly controlled circumstances and with appropriate authorisation – in the interests of national security.
The Agencies require access to communications data - with no control or authorisation requirements - simply because they want it. As "national security" is never defined it can mean anything and is used arbitrarily with no challenge. Thus they are forcing through legislation to capture data they couldn't before.
... Parliament and the public will require more information if they are to be convinced
I for one will never be convinced that carte blanche
communications retention of the entire population is necessary.