I could pretty comfortably raise a family of 6 on $100K in a midwestern city, or a family of 6 on $80K in the rural midwest/south. Without sufficient retirement savings, mind you, and my safety net would be non-exisent. I'd need at least another $30K-$50K on those numbers to build a strong safety net (remember, it's a safety net for 2 parents + 4 kids, not for one person...).
Doing the same in SFBA would probably require at least $250K. Maybe more.
> Surely you don't believe less than 1% of people in the US can live comfortably and have a safety net, do you?
The number is larger than 1%, but probably still smaller than you think.
The average American definitely doesn't have a sufficient safety net. IME, the average American raising more than 1 or 2 kids almost certainly doesn't have a sufficient safety net.
So, no, you don't need to be in the top 1% of earners in the US to have a safety net. But if you have a large family, you probably have to be in the top 10% to live comfortably and have a safety net and retirement.