Edit: Changed title to be more accurate.
Also here is the summary from Wikipedia on what Post-scarcity means:
Post-scarcity is a theoretical economic situation in which most goods can be produced in great abundance with minimal human labor needed, so that they become available to all very cheaply or even freely. Post-scarcity does not mean that scarcity has been eliminated for all goods and services but that all people can easily have their basic survival needs met along with some significant proportion of their desires for goods and services. Writers on the topic often emphasize that some commodities will remain scarce in a post-scarcity society.
Don’t see the problem in that
The problem comes in what you define as “capital”. Food and housing are the biggest issues for the modern world but there still exists the problem of PEOPLE being considered capital that can be owned by other people.
Food isn’t capital. Capital is wealth used to produce other wealth. A house definitely is. Foods just consumable.
Classic “capital” is a hammer owned by a laborer (that situation is one person playing both roles). The classic capitalist separation of layers is a guy who owns a truck full of tools, and he hires other guys to work on things using the tools, but he retains ownership of the tools.
You should be able to own a house. Everyone should be able to own a house. Food of course needs to be owned to be consumed.