But it also leaves open the possibility for lawmakers to simply create a new law which allows snooping. What's "necessary in a democratic society" is also pretty open, and can change from one government to the next.

Scanning everyone’s messages does not meet the bar of necessity. Especially when you look at their reasoning, child safety. Every country in EU should be ashamed of the funding they give police to investigate and prosecute known abuse and abuse materials. When they’ve properly financed policing maybe then they can make an argument that additional steps are necessary but not before.