"But salespeople,typically the most self-motivated of workers,they..."这句话没错吗?

题目

"But salespeople,typically the most self-motivated of workers,they..."这句话没错吗?
其中的" self-motivated of workers","of"不多余?为什么?
salespeople,typically the most self-motivated workers 不行吗？就是没有那个of ，形容词前为什么要有个介词of?

答案

我认为不多余,这里省略了一个名词.其实应该是the most self-motivated salespeople of workers... 因为前面出现过,所以省略了