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National Insurance Contributions Bill

If we were to choose precisely where the policy applied on a much more closely defined geographical basis, we would have difficulties such as distortive behaviour, problems in enforcing the policy, the bureaucracy that may be involved, the need to establish where a company's principal place of business was, and the difficulty of policing the scheme. Also, labour markets tend to be somewhat larger than constituency or even local authority areas. My hon. Friend is right to highlight the circumstances in Portsmouth, but there are neighbouring seats with a very low level of public sector employment and quite a high level of private sector employment. Such labour market flexibility can exist.