whatever+名词 使用方法和含义困惑？

There is no man, whatever his fortune, who is now in any earnest offices.

那里的大家，无论是否有钱，没一个从事正经的行业。

请教老师：whatever his fortune 能否讲一下whatever+名词的这种使用方法？ 为何whatever his fortune 的意思是“无论是否有钱“？

whatever his fortune：这种让步结构常常省略系动词。补全的话，可能是这几种：
whatever his fortune is
whatever his fortune may be
whatever his fortune will be