Earlier quoted context omitted.
Indeed, private companies in the United States already do this. The question is what will the data be used for?
This might show my European perspective, but I'd rather have my government collect such data than some unaccountable private entity. Even better if no one does it of course.
Of course in reality right now, every single channel I go through is a Google channel. I'm writing this comment within Google Chrome, while an Android phone sits arms length from me. Heck, I even route all my non-gmail accounts into gmail. So while it feels different, I guess it really isn't.
And this might show my American perspective, but I trust Google with my data more than the US government (not saying I trust Google, just that I trust the government less). Google is an organization founded on technology, and have shown that they care about pushing forward in innovation in digital security. The US Gov didn't originate because of the internet and haven't really demonstrated a mastery of it.