Do you have any proof to back up that "the rich are 10x more likely to be audited"? Not trying to call you out but I'd like to read it, that number seems extremely far fetched. My guess is everyone has a small percent chance to get audited every year (unless they find a obvious issue) and it's just a flip of a coin.

I imagine they have some kind of algorithm or MI to assist in finding discrepancies based on historical wins/loses.

I doubt it's as simple as I made 10 million, therefore I am going to get audited eventually.