I think that one has to see the improvement in robotics and technology together with universally declining birth rates. Populations will be declining rapidly in just 30 years from now and in most advanced societies such as Europe, China and North America, population growth is only achieved by extending lifespans or immigration. 

The human race has never worked as hard as it does today and we could also start receding toward a four day work week. None of this looks like a problem to me.