It doesn't matter if employees would tolerate it: phone company employees wouldn't tolerate it either but the cell phone and location records of every American were too much for the authorities to resist - the great majority of phone company employees have no idea about the data that is handed over to government.
Google has a very deliberate policy of building a comprehensive record of searches, websites visited, comments, articles, private documents written, people collaborated with and communications - all linked to your real name and phone number. It doesn't matter that employees wouldn't tolerate giving it out, sooner or later some governments will pass laws giving them access to the data. The fact that Google is building the records is enough.
Google employees already object - look at Vint Cerf's confusion when asked about the real names policy.
To paraphrase Chris Morris: But who's to say a government with an authoritarian streak in a time of national crisis will pass a law giving the secret services access to those records?