How the Minimum Wage Earner is Like a Big Bank ?

On the Sunday Morning Show recently there was a piece regarding the minimum wage and a story about a divorced mother of two who has worked for McDonalds for 10 years and is still paid the minimum wage with no benefits.  She indicated that she has decided not to take promotions and that she gets assistance for child care.  I wondered about what the real implications are from a couple of points of view.