After having been a tech executive for many years, I needed to take a break, and I wanted to give back to society. Duke University engineering dean Kristina Johnson gave me a great spiel about how the school’s Masters of Engineering Management program churns out great engineers, and how engineers solve the world’s problems. She said that I could make a big impact by teaching engineering students about the real world and encouraging them to become entrepreneurs. I felt so excited that I joined the university without even asking for a proper salary. That was in 2005.
I was shocked—and upset—when the majority of my students became investment bankers or management consultants after they graduated. Hardly any became engineers. Why would they, when they had huge student loans, and Goldman Sachs was offering them twice as much as engineering companies did?
So when the investment banks tanked in 2008, I cheered because engineering had become sexy again for engineering grads (read my BusinessWeek column).
But thanks to the hundred-billion-dollar taxpayer bailouts, investment banks recovered and went back to their old, greedy ways. And they began offering even more money to engineering grads (and themselves).
Living in Silicon Valley, one gets used to meeting people who are optimistic and who talk about changing the world. But as I lamented in 
