句意：
因为他们就不需要给 作为在高速公路上工作的很多职员 支付（工资）了
as 介词,应该是“作为”的意思那么pay as不是词组了？pay后面直接跟介词可以么？pay as 不是词组，各自独立的。（because they don't have to pay）（as many officers to work on the highways）=they don't have to pay to many officers (who) work as on the highways.用法比较的特殊，=后面的一句，(who work as)为定语从句修饰先行词many officers.原句中，介词as提前，引导的短语（不是句子）做pay的形式宾语。pay后面可以直接跟介词，词组pay off; pay out等。例句：If you don't subsidize ballet and opera, seat prices will have to go up to pay for it. 如果你不为芭蕾和歌剧提供补贴，就得提高剧场票价来为此买单。