To tell the truth, I continued to use the stick for longer than was strictly necessary.

"You want to convince without giving more knowledge than is strictly necessary."

He doesn't want those awful pictures in his house any longer than strictly necessary.

In some circumstances we may share your information but only if it is strictly necessary.

He couldn't trust himself to remain here longer than strictly necessary.

Is it strictly necessary to have a photograph of Cameron?

I found myself writing more parking tickets than were strictly necessary.

Best not to even think about it any more than is strictly necessary.

Europe should not concern itself with more than is strictly necessary.

He gave his son a slightly longer stare than was strictly necessary.