A little research shows this is all probably BS. I did a quick search on banking jobs in San Francisco, Most pay moderate salaries not like the "$150K" reported: Here is the link. Check it out for yourself:
I think you are confusing retail banking with what was in the article. The retail banking jobs are bottom feeder jobs, no question, but the article is referring to investment banking enterprises like Goldman Sachs or Morgan Stanley. Please note the difference between retail and investment banking. Thanks.