The income data from DOS are for households. Double income professional couple households are already included. No doubt, their household incomes would cover the higher end range.

If the data was further divided into the top 10%, it would more accurately capture the double income professional couple households. I am sure many such households will be earning above $50,000 per month!

But even within the bottom half of the top 20%, many are easily saving above $300,000 per year. Especially the more senior or mature earners whose salaries peaked while their financial commitments taper off. From their early 50s to mid 60s, they could grow their networth by $1M every three years.