I'm sorry, we are not a consumerist society anymore? Sure, if you set the parameters to the late 80s, early 90s, but we sure the hell still are if you look even just in comparison to other peer societies.

I don't think you understand that we are essentially saying the same thing to a certain extent. There is so much "debt" and/or capital hoarding precisely because of the free money policies and, yes, the market can't find ways to spend it in a manner that it can determine would result in positive returns. There's a reason that the big tech companies are sitting on mountains of cash and have no idea how to spend it productively. It's rather telling that the tech industry in particular is hoarding such mountains of cash because they understand that there is an inverse precipitous return on deploying more resources beyond sufficient allocation, i.e., more engineers and resources can even be counter-productive.

UBI works in a tightly controlled little petri dish experiment where it cannot and the scale does not impact the economic systems. Yes, population had been stagnant and reproductive rates have been negative among local populations in the developed world, but that's the point, the under-developed world has not at all staved their reproduction rates or populations and there is nothing indicating that they will. Reality is that they are qualitatively different matters too and a ticking time-bomb waiting to go off, especially as leftists with bleeding hearts on their sleeves want to scoop up everyone in the undeveloped-world and take them into their home like some crazy cat person where they will then become evil western high environmental impact consumers.