I can't speak for Europe, but in the west, a vast majority of people already accept that the government is doing mass surveillance, and they think it's a good thing. It is similar in China, India,etc.. from what I understand. I don't know enough about europe.

This scale has been possible since at least the mid 00's (20 years now , technically a historical fact). consider that most of the files in snowden's leak were from around '08.