When you look at this theory, you realize that it suggests a very important technology for improving human welfare and by spreading risks.

这一理论，提出了一个重要的技术,即可以通过分散风险，提高收益。

耶鲁公开课 - 金融市场课程节选

This is not what economists call a Pareto, or welfare, improving policy.

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Reforming welfare, improving schools and creating jobs would help not just those who want to be better off, but it would also help others out of poverty.

BBC: David Cameron reveals his inner Tory

Improving welfare, for his workers and in the country as a whole, was one of his concerns, and he sat on numerous committees that sought to do good.

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