Techsourcing has been going gangbusters for years. Recently we passed the point where there are more semi-skilled workers than jobs requiring them. This trend is going to do nothing but accelerate and is impacting skilled workers as well. The question remains: what will the excess workers do for a living?
The Democrat plan is to put them on the government plantation. Socket them into a government job or program and finance the ever-growing cost of their upkeep. I don't know for sure what they will do with them when Other People's Money finally dries up. Some type of Soylent Green solution, I suppose. They already do everything in their power to keep the hoi polloi from reproducing.
The Republican plan is...? With techsourcing, growing the economy does not necessarily result in more jobs-it may actually result in fewer jobs as breakthroughs in productivity occur. I don't have any ideas, myself.
If we had a hands off government, the solution would “magically” appear and many people would find jobs in a nifty new industry. However, we have the restrictive, heavy hand of government holding back innovation, so you are right to be concerned.
The U.S. government is already confiscating a percentage of automation output via the highest corporate income tax in the world and via other taxes and fees. An energy tax is in part an automation tax. As long as we have energy, that wealth keeps getting created and won't run out, although the beast will always want more. Borrowing trillions from the future is a bet that future robots will be able to service that debt. The unemployed will become essentially human pets and will gravitate to the big cities where it is easier to house and care for them. Like most pets, they will be fixed in exchange for treats, so the surplus pet supply will eventually be reduced. If for some reason the government comes to a point they can't afford or find new homes for their pets, or the pets get too old and expensive to care for, most will be put to sleep. A nuclear war which wipes out the big cities would also solve the surplus problem.