"We are the masters now." I wonder if President Barack Obama saw those words in the thought bubble over the head of his Chinese counterpart, Hu Jintao, at the G20 summit in Seoul last week. If the president was hoping for change he could believe in—in China's currency policy, that is—all he got was small change. Maybe Treasury Secretary Timothy Geithner also heard "We are the masters now" as the Chinese shot down his proposal for capping imbalances in global current accounts. Federal Reserve Chairman Ben Bernanke got the same treatment when he announced a new round of "quantitative easing" to...