At the most basic level, a central bank must be clear and open about its actions and operations, particularly when they involve the deployment of public funds.
If you're in a car crash, you're mostly involved in trying to not go off the bridge, and later on you say, 'Oh my God!'
Economic management involves the operation of economic frameworks in real time - for example, in the private sector, the management of complex financial institutions or, in the public sector, the day-to-day supervision of those institutions.
Long term, I have a lot of confidence in the United States. We have an excellent record in terms of innovation. We have great universities that are involved in technological change and progress. We have an entrepreneurial culture, much more than almost any other country.
The inflation objective is explicitly a long-term or medium term objective. It focuses on, for example, core inflation to avoid getting involved in short-term fluctuations in energy prices and the like.
The Federal Reserve can only buy Treasuries and agencies, and moreover quantitative easing typically involves buying longer-term Treasuries and agencies in terms of bills, for example.