That's because this article, like many others, idiotically conflates "income" (money received as payments) and "wealth" (things of value in storage). Income is

That's because this article, like many others, idiotically conflates "income" (money received as payments) and "wealth" (things of value in storage). Income is typically liquid; wealth, often not so much. Your Bay Area director might have high income but relatively little wealth. Gates and Buffet probably get substantial dividend income but it's their wealth that's so staggering. Grandma might have lots of wealth in her home but if she has no income to pay the taxes, trouble.