One little problem no communist country has ever solved. How do you convince the productive minority to keep working while receiving none of the benefits of their own labor? Communism is slavery.
Robotics. The USA is on the cutting edge because of our large military spending. All we need to make the final leap is a robotics cold war, or a real robot war, with a competitive opponent. After the war, for the first time in history the welfare state will finally become sustainable. It's ironic that conservative white male engineers, which generally hate the welfare state, will be the ones that finally make it work.
Agreed - see tagline of many years...