We are, because people want luxury goods too. Post-scarcity is about being able to produce most goods with barely any human labor (would absolutely be true for food if every person on earth only worked in food production or to produce machinery needed for it), which we aren't even close to. AI and automation might get us there (though it's questionable when the cycle of just investing the newfound labor capacity into more luxuries will stop, if ever), but people are actively resisting that (reasonably so) because the current economic system basically everywhere is horribly rigged towards funnelling the excess wealth to rich individuals rather than improving the living standards of society as a whole.