Cameras in the bedroom? House-to-house searches? Cavity searches by the TSA? In each case, the government could argue that it would get less information and be less effective without them.
We even wrote a script to showcase how easy it is to write such a statement for an arbitrary invasive program.
The script below will generate statements by senior government officials, based on actual quotes and statements used to justify the NSA spying programs, with the name of the program changed. If a statement can be used to justify anything, it really justifies nothing.