Because normal contracting for things, when you're spending government money, you're spending our money, tax money, and the people who are in charge of that are very aware of it so the temptation is to control exactly how you spend it.
一般的合同 都是要政府付钱的， 也就是说，要花我们纳税人的钱， 负责项目的人很清楚这一点。 因此，关键是要控制花钱的方式。