Earlier quoted context omitted.
They briefly mention it, but quickly move on to "the FBI doesn't knock down rich people's doors". In this case it's more likely these particular rich people (i.e. well-connected people in the US government) than a blanket policy of "don't knock down doors in affluent neighborhoods".
Are there many neighborhoods packed with unconnected rich folks?
After all, maybe I make $300k a year and think our mayor is, by the standards of politicians, one of the good ones; and getting invited to fundraising dinners and charity galas and rubbing shoulders with influential people makes me feel important and successful. So maybe I'll donate a few thousand dollars every election cycle.
On the other hand, maybe you make $300k a year but think political donations are a grubby embarrassment; that fundraising events are full of fools, the stuck-up and the self-important; and that the two parties produce policies that are barely worthy of your vote, let alone your money. So you don't donate anything.