man i fuckin wish we'd move to a post scarcity CULTURE, and we already have the TECHNOLOGY to do so, but as long as there are greedy assholes, we won't have this.
The greedy asshole factor has been a problem since the beginning of history and depending on who you talk to, since the dawn of humankind. But maybe it begins when life began and greedy assholes aren't a product of poor moral choices, but of evolution. That said, I believe that a percentage of human beings will always be assholes and that the real technological challenge is how do we deal with them.
If we had the technology to grow our own food, collect water, and provide shelter for everybody on the planet sustainably and in abundance, why does it matter if there are greedy assholes?
Well, I think we've had all that for hundreds if not thousands of years. But assholes, driven by the anomalous moral dynamics of their aberrant biology leverage the surplus towards their own ends, to the detriment to everyone else.
In fact, there are perfectly non-asshole scenarios where a minority can gain economic leverage over the majority (I can do some research on the matter if anyone wants, I'm just not awake enough to give the argument a fair hearing).
Though, to be fair, you've suggested some technological solutions (AI/blockchain/etc) where the surplus could be managed to prevent conflict and domination.