the marginal cost of labor will rapidly approach zero.....................................Moreover, history shows that although capital (in the form of facilities, machinery, and knowledge) have substituted and thus displaced labor time and time again, labor has nevertheless evolved to remain complementary to that capital.

This illustrates the problem I always have with these discussions. It's even more frustrating in this article, as it clearly states facts, but in the most cowardly of fashions avoids honest implications. How are we supposed to have a free market economy based on capitalism when there is zero value for labor either physical or intellectual?

Every single part of our financial system is based on that; from banking to mortgages to consumer spending to the stock market having valuations to property having valuations. If every single job you can imagine, even the future ones, can be done by machines that are vastly cheaper than humans on the minimum wage, you cannot possibly have an economy that is anything like today's. Yet cowards that they are, the authors of this article lead us all they way to that conclusion, but are too scared to say it.