The solution to this problem is free education and a basic income. We should start with a grant for 60 credit hours of community college and a basic income at 60% the federal poverty level.
I think you're underestimating both the scope and the magnitude of the problem.
First, consider that the problem we're facing here isn't just going to affect only low-skilled workers. Artificial intelligence, automation and robotics will ultimately impact higher-skilled workers too. It's only a question of time. If IBM's Watson can already diagnose illness better than a physician with a decade of college and on-the-job education under their belt, than even doctors have something to worry about. Don't forget that we're at the point now where nearly 1/3 of all Americans already have at least a bachelor's degree. When the economy itself needs fewer and fewer workers to produce more and more goods and services, a few extra free junior college units isn't going to keep average Americans employed.
Finally, the end-game here is all-too obvious; with an increasing population chasing fewer and fewer jobs, a basic income at 60% of the poverty line isn't going to do anything but ensure grinding poverty in the future, likely for decades to come, as the vast majority of Americans will never be able to find work again.
Overall, after careful consideration of the problem, I think this plan sucks. We as a nation ought to be able to do better than that. A handful of the uber-rich presiding over a nation of hundreds of millions of perpetual beggars is what I would consider a nightmare scenario. It does not have to be this way. I pray that we'll find some way to avoid this kind of apocalyptic scenario. I suspect it will require a great deal of out-of-the-box thinking, and we'll likely have to abandon some of our cherished capitalistic principles.