I believe communism will strike America in the future. Already, newer machinery has been released to the public, making it virtually "hands-off" for people. Perhaps this may show that there will be less jobs in America. Either that or because of the lesser demand of human labor, Americans will depend on robots, "sharing the wealth" that the robots make. Although some undermind current technology, there are indications that newer and technology will be released such as taxi cars which dont need drivers.
Communism will never be adopted by Americans. Our unique culture can not tolerate it. Furthermore, communism fails in every country in which it is tried. Your arguments about machinery have nothing to do with the topic. Machinery is built by capitalist corporations.
If there becomes a time when manual labor isn't needed because robots were able to take over jobs and positions formerly owned by humans, robots might control most of the goods produced in America. Chances are, we might share all the products made by robots without having to lift a finger.
To conclude my argument, I would like to say that, technology is changing at a significant rate. If you haven't heard so already, there are drones that anyone could have such as these drones that hover near you and can supply clean oxygen if you are in an area with low levels of it. Things such as faster machinery in factories which might not even need human labor is being developed. I wouldn't be surprised if robots could control our food supply within a hundred years. Less human labor will be demanded and more things will be given to us without even lifting a finger. Maybe robots will supply our every need and we will "share the wealth" robots produce.