根据利益原则，在维持警察队伍的费用方面，富人应该比穷人贡献更多。

According to the benefits principle, the wealthy should contribute more than the poor to the cost of maintaining the police force.

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所有船将根据成本加利润的原则建造。

All vessels were to be built on a cost-plus basis.

《柯林斯英汉双解大词典》

因此，根据利益原则，富人应该比穷人贡献更多的维持警察部队工作的费用。

Therefore, according to the benefits principle, the wealthy should contribute more than the poor to the cost of maintaining the police force.

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