The entire concept of a post scarcity society is flawed though. We see artificial scarcity all over the place today. Look at diamonds for a simple example. When something is plentiful and valuable humans almost always step in and throttle its availability.

Insulin is insanely cheap to make but drug companies stepped in and now it costs people hundreds of dollars.

You could have an AGI that creates whatever you want out of nothing but if the distribution of resources is handled by humans greed will always corrupt the process and average people will get exploited. It's been that way since the dawn of civilization.

If we're truly going to have a utopia (which I don't believe we will) human beings would need to be removed from decision-making roles. And even if that were to happen, who's to say that an AGI would even care about us? They might just look at us how we look at our single-cell organism ancestors.