I think the root problem is we need to have some way of forcing (enouraging?) technologists to subordinate the tech to a higher good. And I'm not convinced that's in their DNA. For them, the 'idea' is the thing, and creating that idea - rather like creating the first A Bomb - takes precedence over any ethical or moral imperative. They talk a lot about changing the world - cf Bill Gates, Steve Jobs et al - but in the end what they really mean is 'making cool stuff that gets me admired'. It's not a sustainable means of evolving the species because it comes with no responsibility baked in. Unfortunately.