Some long-ago fat cat boasted that "someone who has a million dollars is as well of as if they were rich." But with all the inflation in the intervening years, that can hardly be said now, and at this point lotteries usually pay
several--sometimes dozens--of millions of dollars . . .
If the "richest" conservative senator has only $2 million, there are no conservative senators who are actually rich. But there are lots of "liberal" senators are.
The richest Republican by far is Lincoln Chafee of Rhode Island ($53.6), who is also by far
the most liberal GOP Senator.
Your math makes great sense.