If the markets had behaved badly that would obviously add to people's sense of alarm... but there has been a lot of reassurance coming particularly in the way the Brits handled all this. There seems to be no great fear that something like that is going to happen here.
If you ask an economist what's driven economic growth it's been major advances in things that mattered - the mechanization of farming mass manufacturing things like that. The problem is our society is not organized around doing that.