Re: "If the average consumer is unemployed and has no income, he is obviously not going to be purchasing stuff for his machines. In fact, ownership of the machines will concentrate into a shrinking elite as machines take the jobs of average people."
Sure - but that was not the point which you were making that I was criticising:
You argued that unemployment would mean that spending would decline - and the economy would plummet or crash.
Whereas a more accurate analysis suggests that those in charge of the machines will ramp up their spending to feed the demands of their machines - thereby contributing to expenditure in the economy. In other words, the machines will buy and sell things - if not directly, then via companies or humans. This is not really a "jump into the stuff of science fiction" - people regularly buy things to "feed" their machines today.
The machines act as consumers - in that they consume things - even if there is a human or corporation who is buying the things involved somewhere. So: the whole idea that the economy will collapse because nobody is earning money and buying things falls down. Machines will still be earning money and buying things - even if they will be doing it by proxy agents in the form of corporate or human masters.
This idea is a fairly central one in "The Lights in the Tunnel" - and it is based on unsound thinking and bad economics :-(
Re: "Everything produced by the human economy is ultimately consumed by individual human beings."
That seems like a rather muddled way of looking at the situation. Machines have needs too. They slurp up gas, oil, electricity, raw materials. They consume - and excrete - along with all other agents in the biosphere. Companies act as non-human consumers too. It could be argued that machines and companies are slaves to humanity (to some extent - though the inverse perspective - that they are using us to manipulate the machine world into existence - also has considerable validity) - but that doesn't mean that we consume their waste products.
Re: "If too few people have the ability to purchase END products, the mass market economy will collapse."
No: the issue is not the number of human consumers, but their total spending power. Rich minorites commanding huge squads of machine minions could generate a large demand for resources - and the also ability to produce those resources - thus lubricating the economy very effectively.
Of course in a human democracy, voters would try hard to ramp up corporation taxes - in order to resist such huge inequality - but that is another issue entirely.
So, if say a million people owned all of the machines in the world, and they had no use for the human labor of the other billions of people in the world, you would still classify the economy as very effective?
I guess the question is what counts as an economic crash? A million extremely well off people with machines to tend to their every need and billions with no useful skills to acquire capital seems like a crash to most of the people involved.
The question that the ideas are supposed to be in response to is:
Here are links to some proposed ideas that you should vote for, assuming you agree with them. You do have to register to vote, but the email confirmation arrives right away and it shouldn't take much more than two minutes of your time altogether. Why should you do this? The top voted ideas from this request for ideas will be seen by some of the top policy recommendation makers in the USA. They probably won't do anything like immediately convene a presidential panel on AGI, but we are letting them know that these things are really important.
Research the primary cause of degenerative diseases: aging / biological senescence
Explore proposals for sustaining the economy despite ubiquitous automation
Establish a Permanent Panel or Program to Address Global Catastrophic Risks, Including AGI
Does anyone have any other ideas? Feel free to submit them directly to ideascale, but it may be a better idea to first post them in the comments of this post for discussion.