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National Insurance Contributions Bill

We have had a hypothetical debate about the abolition of the upper earnings limit, but there is a slightly more relevant and recent point and it would be interesting to have an idea of how the Government would treat the issue. Four or five years ago the decision was made to invest in the national health service and it was decided that there should therefore be an increase of 1 per cent. right the way through national insurance, effectively abolishing the upper earnings limit in respect of that 1 per cent. additional element. Will my hon. Friend say what safeguards were put into place then and how they might differ if the Government get their way in the Bill?