Correcting imbalances in the world economy is widely believed to be critical for long-term economic recovery, but discussions on this issue have overemphasised US-China relations, especially the Chinese currency. This has diverted attention from the real issue: there is insufficient effective demand globally. For the world economy to recover, there has to be a boost to global demand while avoiding new financial bubbles.
Recent analysis by South Centre on the extent to which major economies are contributing to global demand and what policy reforms they should undertake points to one finding: the main solution lies in national policies designed to address overconsumption in the US and underconsumption in countries running a surplus.
The US economy, with its problems of overconsumption, high household debt and trade deficit, has to adjust. To address its imbalances, it has to simultaneously reduce consumption and increase exports, while improving financial stability and avoiding new financial bubbles. This adjustment may, however, cause its own problems for many developing countries, as it could result in increased interest rates (bad for indebted countries) and a higher dollar (exerting a downward pressure on currencies in countries in deficit).
Germany and Japan also have to play a more positive global role. These countries, such as China, have been having large current account surpluses (7.5% of GDP in Germany and 4.8% in Japan, before the crisis), but the contribution of Japan and Germany to global demand and growth is much smaller than China's, and their reliance on exports is much greater. Japan's trade surplus with the US is higher than China's, in value-added terms. Moreover Japan, and particularly Germany, have been siphoning global demand without adding much to global growth. Underconsumption then becomes a major problem: in Germany, there has been high unemployment and stagnant wages because of an over-focus on price stability. In both countries, the share of wages has fallen, thus suppressing consumption: these two countries need to increase their contribution to global demand by expanding their domestic consumption through faster wage growth. This would spur more imports and reduce their trade surplus, which would contribute to other countries' exports and GDP growth.
http://www.guardian.co.uk/commentisfree/2010/apr/23/global-economy-boost-demand-economic-recovery