The submitted title was "Volkswagen seriously made a PowerPoint deck on how to cheat emissions tests". That's more linkbait, which is driving the wrong way down a one-way street.
Any product feature like that would most likely need to be known to a number of teams such as marketing, engineering, production, documentation, compliance, supply chain, QA, tooling, support, or whatever they call those inside VW. So many teams would be coordinated by a pretty high level exec.
source: rogue engineer
I imagine governments will be more careful in checking manufacturers are actually meeting standards after this.
Plus, more often than not, the technology to make cars cleaner is available, but expensive and so manufacturers don't use it.
Water-methanol injection, for instance, is well proven tech (since WW2), but not adopted at large scale because it requires changes to gas pump infrastructure etc. The only way to overcome a chicken-and-egg problem like that is governments making it mandatory.
The day it was announced the CEO stepped down, said he knew of it, and assumed responsibility.
I’m not sure where the "rogue engineers" myth comes from, but VW Germany said on day one that it was top-level managers involved in it.
Edit: The rest of your comment is false. The day the news came out, Winterkorn posted a video acknowledging the problem but not mentioning resignation -- he did not resign that day. And when he did resign, he explicitly said that he was not aware of any wrongdoing on his part. http://www.nytimes.com/2015/09/24/business/international/vol...
So, no, my comment isn't false — but yours isn't either.