My position is that if we get the government out of business, out of money and out of interest rates, allow the people to be free from government oppression, get rid of income and wealth taxes and get rid of government sponsored wars and all other forms of redistribution then the economy can accommodate any number of workers because automation is not free.
Automation is a form of capital investment, some forms of automation are simpler than others. Writing a script to automate server restart and network configuration is much simpler than acquiring a humanoid android capable of arbitrary tasks. It's not impossible, it's just expensive.
A humanoid android will have an upfront cost comparable to other machinery and any company has a choice to incur that cost or to avoid it by hiring some employees and having operational costs as opposed to capital costs.
Capital costs are more difficult to justify for a company anyway because they are much larger than any operational costs. Putting together a fully automated factory takes an effort and a cost, putting together a partially automated factory can be done much faster and the operational costs would be much lower than the initial capital investments into a fully automated factory. Of-course over time more and more could be automated in a factory, my position is that in a free market capitalist system there is no reason why there shouldn't be more factories started by businesses if they had access to some capital savings.
In today's environment there is very little capital savings in the system available to any new businesses, the investments are absorbed by the giant government borrowing and spending machine and the fake ratings provided by the bought rating agencies are not helping the matter, making the government debt look much more attractive than any private investment because it *seems* that government debt is risk free.
Of-course in reality government debt is not simply *not* risk free, it is the riskiest of all assets.
As to communism, obviously it never worked and always caused mass starvation, mass murder, mass oppression, mass suffering. It will not be different in the future, people are not ants, those of us capable of accruing massive amounts of wealth are not doing it to give it all away, they are doing it to build empires, which makes perfect sense, that's our destiny - the most capable of us build empires. Emperors can be charitable but they do not share power and giving away power is a rare thing.
So AFAIC the struggles between those of us who can and those of us who cannot will continue and this struggle and since the masses are unable to accept that they are not the ones occupying the thrones they will always end up revolting.
Of-course in the future revolting against emperors will be as dangerous (if not more dangerous) than in the past. Mass surveillance and robots, drones, automated armies will be able to put down massive revolts.
I think the only way for us not to keep murdering each other is to ensure that our system is based around free market capitalism, because free market capitalism at the very least provides tolerable (and possibly pleasurable) life styles even for people who are not exactly on the top of the highest of pyramids.