IIRC, Rush quoted a RANGE of incomes.....between 50K and (approx) 337K that was in that category.
....no, I didn’t hear any citation for it, either.
I’ve done an exhaustive search on the web to support this and cannot find anything. everything I read says if you make 50,000, you are in the top 50%. If you make 75,000 you are in the top 25% and so on...So, it just doesn’t seem possible that a family making 50,000 could be included in the top 10% - unless he is making the assumption of a household with two incomes at 50,000 each?