So I don't think that's the cause here, because:
https://googleblog.blogspot.co.uk/2013/06/what.html
"Press reports that suggest that Google is providing open-ended access to our users’ data are false, period."
"Any suggestion that Google is disclosing information about our users’ Internet activity on such a scale is completely false."
And you have chosen not to believe a statement made in the strongest possible terms. If you won't believe this, then I do not think there are any words that you would believe, so there's no point in trying to get more published.
> What can you offer me other than root access to your servers?
Indeed, and we can't do that because it would invalidate the very security that you want.
> If up until today, Google was a good company and wasn't abusing anything in any way, and suddenly tomorrow they turned evil, why would they erase my data first? They still have it, and I have no control over whether or not Tomorrow-Google will keep it.
The easy solution here is to not keep any of that data in de-anonymised form for longer than is necessary, but then people don't want to believe the privacy policies which say this is happening...