Robots for Humanity's assistance?

"How often do I have to repeat this argument? There are not enough trained, affordable and available people!" So says Maja Matari?, a robotics professor at the University of Southern California, when explaining the rationale for building robots to assist humanity socially in the future. "If every single young person 20 years from now takes care of an old person, there's still not enough people to look after all of the old, not to mention…