"If you have a household income of $33,000 (in a household of 2 adults) You are in the richest 9.9% of the global population"

Really, almost 1 in 10 households with 2 people in the world make more than $33,000 USD/month after tax?

Not convinced, this isn't even close.

Edit: yes, I see now this is monthly. Leaving it as-is so the replies make sense.