I don’t see how you can look at what happened in the last year and conclude we are anywhere near “post-scarcity”.
All scarcity problems since 50 or even 100 years ago are artificial self inflicted constructs.
We are post-scarcity the moment we simply decide to be.
The reason we haven't and wont any time soon is property rights and everyone who has anything to lose in any redistribution or any change to future distribution.
It wasn't that long ago that 30% of children died before age 1. Imagine having a baby and there is a 30% chance it is dead in a year? That is almost all of human history.
The complaint will remain constant no matter what. If everyone owned a BMW some people would complain there is this aristocratic class that has a 7 series while the peasants all own 3 series and that we need to make things more equal.
We are so equal that the richest man in history and a homeless person practically have the same smart phone.