[goldbricked]

For the most part of the last century, the question was answered by creating more demand to keep the work force steady, thusly increasing the amount of produced goods and services constantly with the increased productivity.

However the increased productivity also applies to extraction of ressources and destruction of ecosystems. On a planet with limited ressources we need to do the exact opposite, imho. That is decrease the amount of work done in extractive and destructive labour and channel all following and already existing productivity gains into sustainable work.

This will definitely need serious redistribution schemes, as well as lots of regulation.