There are also deep ambiguities in the response of public opinion if, say, a firm is playing off well paid workers in its Dutch plant against lower paid workers in its Polish one. In the supply chain one typically finds workers with different levels of living engaged on different parts of the production chain. There is little competition among groups of workers in countries with different standards of living, and even if there might be problems of inter-union cooperation along the chain, these are considerably less important than differences in labour supply, political regime and corporate strategy. In these situations the strategy of moral appeal has potentiality, not because it is so powerful, but because it is all that there is