The moral of this economic story is that whenever someone who has an incentive to lowball the burden of a tax is speaking or writing, be careful to look at what happens to take-home income as a better guide to policy.
It is true that if labor becomes more efficient, workers must find other uses for the time they now have available. But why is this a problem? Human beings have unlimited wants, and there are always new uses for human labor.
Successful entrepreneurial strategy incorporates learning of all types from trial and error. What other choice is there for entrepreneurs, since they are not omniscient or omnipresent in market processes?
The Roman Empire never doubted that it was the defender of civilization. Americans have added freedom and democracy. Yet the more that may be added to it the more it is the same language still. A language of power.