Hubby made an observation about 3-D printers

[Nuclear Unicorn]

101. Food production is not the sole industry of human society -- because of technology

And I understand the relation of tools to work. But that's my point: not only can we do more work because our tools allow us to but we can now pursue different kinds of work because now a few can produce for all what all used to have to do for themselves. Farmers have doctors because the farmer has the tools to produce enough for food the doctor, her nurse, the hospital administration, the janitors, the pharmaceutical company, the chemists, the college professors, the electric company workers that power it all, the road pavers, the police men, the government regulatory body, etc etc etc.

Now, with this new technology, I think we're watching the dawn of another phase of human industry that sees the means of production decentralized to the middle class.