You shouldn't consider it the exception.
The rich are usually not so narcissistic they will only let sycophants work for them, so they dot their i's and cross their t's correctly. There's a lot of room for being sneaky in ways most of us disapprove of before it crosses into criminal.
However, we've also had Bernie Madoff and… wow, this is a long list of American politicians convicted of fraud:
https://en.wikipedia.org/wiki/Category:American_politicians_...
I've only noticed four overlap on the subcategory of mail and wire fraud, too:
https://en.wikipedia.org/wiki/Category:Politicians_convicted...
And at the time of writing, this list is disjoint also:
https://en.wikipedia.org/wiki/Category:Politicians_convicted...
(Though looking at the details, that isn't what I would've expected from the description "American politicians convicted of" as a Canadian is included; technically yes, and I won't speak either way as to if I think you should count that).