The more people are being outperformed and down-performed by the competitive asymmetrical mechanisms in the current economic structure, the more will things like this incident happen.
How about majority profitability and avoidance of opportunity costs? The homeless girl you met is a result of macro economic policy decisions.
How about the U6 unemployment rate is too high? How about low-flation and the rigid monetary policy causes slow growth and higher unemployment?
The homeless girl in the story is part of a bigger macro picture in an economy that is outperforming and down-performing more and more people.