Paradox of Protectionism
Because hardship from globalization is so difficult to distinguish from hardship in general, it would be open season to put up trade barriers in industry after industry. Widespread protection would surely meet with retaliation from abroad. Even if people gained as workers they would lose as consumers, investors and future pensioners. Moreover, the protection of jobs and pay would be short-term, because it would gradually lead to companies losing competitiveness as rivals in India and China innovated. Paradoxically, therefore, the greater the number of people threatened by globalisation, the less each of them is likely to gain from getting their governments to stand in its way.
From The Economist.