Agreed on all points Steve. I really dislike the term "post-scarcity" because such a set up isn't possible and worse; isn't representative of the idea being conveyed. I much prefer a term such as post-labour economics because what we're essentially talking about is an economy in which automation becomes sophisticated enough to make human labour entirely unnecessary or negligible.
From that point we have a problem because our current economic systems work on the principle that the majority of people can accumulate wealth through labour, so without that we're left in a position where we don't have an effective and ethical system (possible exception would be a Keynesian capitalist economy) for people to accumulate wealth.
From that point we have a problem because our current economic systems work on the principle that the majority of people can accumulate wealth through labour, so without that we're left in a position where we don't have an effective and ethical system (possible exception would be a Keynesian capitalist economy) for people to accumulate wealth.