Earlier quoted context omitted.
Not under ECHR, which has twice as much signatories as EU has members and the other half is twice less chill compared to the EU. I don't remember whether the EU top court can repeal EU laws, but general answer is no. It's politics -- if the government is full shitheads that somebody voted for and then haven't protested hard enough to boot out -- then they can ignore constitution, jail judges, behead journalists in a…
Do EU treaties per se contain any language that might be relevant to privacy? It seems axiomatic that legal systems contain provisions that prevent their violation. However, democracy requires that laws are voted on by elected representatives or plebiscites, which can of course mean repealing prior laws. However the EU institutions are not sovereign, which might be the loophole here? Edit: I'm aware that the EU is on…
It is generally assumed that the ECJ has ultimate precedence over national constitutional courts, but I have my doubts. As a thought experiment, imagine it wasn't the EU, but the Chinese CCP with whom the treaties were concluded. It then quickly becomes clear why a national constitutional court fundamentally cannot accept the unconditional transfer of jurisdiction to a foreign entity.
The German Federal Constitutional Court (BVerfG) already stated in its judgment on the Public Sector Purchase Programme (PSPP) that it is prepared to intervene in the event of an exceeding of competences (ultra vires). Furthermore, the BVerfG has repeatedly defended the fundamental rights to privacy against the government in the past. I am relatively certain that the warrantless chat control would not succeed at the national level in Germany. The question is how the BVerfG will react if the ECJ gives the green light to chat control. As I said, I still have hope.