Debate in a corporate environment is, in fact, masterminded. In these cases, its often specifically encouraged, in a certain fashion. The venues for the debate are built and moderated for that purpose, backed by the policies of allowed conduct of the employer.
It’s probably worth bearing in mind that in any company that pushes this kind of ‘open’ communication, there’s an unavoidable pressure on most ordinary employees to say the ‘right’ things. A company that has so much of its internal correspondence open and visible to anyone will very quickly descend into 1984 territory. So those ‘dense’ folk bleating about integrity are likely to really be saying ‘I would never leak, boss, you can trust me’. And in all likelihood, the actual leaker is one of those voices. Personally, I find it baffling that so many supposedly intelligent people see an office under the Eye of Sauron as a Good Place to Work.