Changes to American paper money

In the article one of those interviewed stated that he thought adding the new people to the backs of the bills would lead to their becoming role models.  I call foolishness.  How many people could list who is on each of the bills: 1, 2, 5, 10, 20, 50, and 100?  Unlikely I rate that idea.  On the other hand, I don't see any problem with the design changes.