Companies that have new ideas or new technologies that buy plants and equipment create new jobs, and the people who get those jobs will become new customers.
Mercantilism has been pretty well abandoned as an economic doctrine particularly since piling up unsaleable stuff has so many times proved to be a losing strategy!
If you increase productivity and make stuff cheaper, you will probably need fewer employees, yet the people still earning a living somewhere will have more disposable income because, lo and behold, they can buy stuff cheaper.
The unemployed remain unemployed under all these scenarios.
If you think there's still some fire in Mercantilism fire away ~
B2B is only ONE kind of economy. It does not employ anywhere near the number of people that are needed to be employed. The 70% of employed that work for small business are left out of this equation, or are unmeasurable in the effect of this “tax break” for corporatist pals of obambi. keep in mind big pharma that got a free pass from obamacare.