I was at Google during the time period when they shifted from leaks being rare to "literally every non-public thing told to the wider company got leaked". I can

I was at Google during the time period when they shifted from leaks being rare to "literally every non-public thing told to the wider company got leaked". I can't say there was any particular cause, at least at the time, beyond just getting large enough that the probability of having a few assholes take advantage of management transparency goes up. Note that I'm very much not talking about leaks for perceived moral reasons, like the China search engine, pentagon contracts, etc; these make up a small fraction of the leaks, which are more around things like product and feature launches.