In case folks don’t get the ramifications, the NATO nations have long been rumoured to have a sort of “Throw Grandma from the Train” network going on where they all circumvent their own laws against surveilling their local populous by making agreements amongst themselves. “I’ll spy on your folks and share the info with you if you’ll spy on mine.”
And thus they give the lie to their claim that the primary goal is national security. One does not blithely acquiesce to comprehensive foreign spying on the affairs of one's country by foreign powers if national security is one's primary concern or goal. One does that to remain in power because one views one's own population as a threat. There can be no other reason.