Furthermore, it is impossible to find a home in the bay area for under $600,000. I'm certain that those starter homes are not being occupied by high net-worth individuals with $200,000/yr salaries.
I have been told that your monthly payments should not be more than 45% of your monthly household post-tax income. That comes out to a mortgage that can be about 5x your income. With those numbers, the lady in the article should've had a household (her + her husband) income of about $150,000/yr.
I'm a recent buyer of a $625,000 home with a $85,000/yr salary and I have no problems keeping up with my payments and establishing an emergency fund.
Also, I'd like to point out that this woman took out an interest-only loan for the bulk of her debt, skimped on the deposit, and secured with another loan. Even if we use your standard (45% of net income), there's no way that she could afford the property.