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.
Because you can’t eat ideas.
We can have all the free information in the world, the people who control the bare necessities still control the bare necessities and they can use that to keep people down and divided.
Exactly. Information is a luxury - you could go your entire life without learning even a shred of information, but you’d still need to eat.