I read several comments made about those who lost their jobs can now re-train themselves and apply their productivity elsewhere. But would there really be such opportunities in today's hyper-efficient economy? Think about iPhone apps. Only a small percentage of developers at the top make money. In a sense, the rest of the developers are out of work. Now, if they were to apply their productivity elsewhere, they would need to find a different market. So, they might try the Android market but there too, there are only small percentage of people making any money. Do you think there would be enough markets in the world for everyone to be in the top percentile that makes money?
Furthermore, the efficiency is an effect of the entire market. It is the market collectively that identifies the best products/ideas and rewords them disproportionately. We humans have limits in how quickly we can become efficient. At the rate the world is becoming efficient, we humans cannot humanly catch up with that speed. It is dehumanizing to expect people to do so. So, I don't think it is fair to blame those who failed to adapt quickly enough.