For me responsibility is a key component of getting shit done. You do need an environment where fear is driven or so that if someone feels they can not fulfil they're responsibility they can come forward for support. But in my experience if everyone is responsible for something it often ends up no one is.

Accountability should not nearly be as negative and adversarial as Alan portrays though it is admittedly often treading a fine line. As a leader i try to be accountable for my area of responsibility and aim to filter external blame from the team. I encourage my team to be introspective about our processes and to continually improve, I definitely don't find finger pointing helpful.