flat tax

例句：

1. 1. The government is considering a flat tax on all incomes above a certain amount.
   政府正在考虑对超过一定金额的收入征收平税。
2. 2.The flat tax system aims to simplify the tax code and make it more user-friendly.
   平税制度旨在简化税法并使其更加用户友好。
3. 3. Some argue that a flat tax would be fairer than the current progressive tax system.
   一些人认为平税比当前的累进税制更公平。