Except UBI will HAVE to happen whether we like it or not..
First world countries are approaching higher and higher levels of autonomy...
Not strictly speaking true.
The purpose of capitalism is to extract value from workers and funnel that, in the form of money, to the elite. The whole purpose of capitalism is to give the workers just enough so they feel compensated for their work, but no more. Then wealth can flow upwards to the elites.
Now in a world with automation, the elites can control both the resources necessary for production and also the means of production itself. They do not need the lower classes. Moreover, they will be unable to extract anything from the lower classes - indeed the lower classes will be a drain on the elite, extracting UBI from them.
This I believe will be the turning point. When the elites are no longer able to extract value from the workers, society will undergo drastic changes. This could well result in billions being allowed to starve as they have no inherent value to the elites.
I'm not sure if I'm explaining this very well, but let me try this on you... We are allowed to exist today because we contribute to the wealth of the elites. That is the only reason we are allowed to exist. In a world where we all get paid UBI to do as we please, we no longer contribute to them.
And since the elites control all land, mineral wealth, law, military, etc... when we stop being useful to them they will be in a position to jettison a large part of the world's population. Ie, to let them die off.
e2: Just in case anyone thinks this is ridiculous.
Imagine you own a house and you have a family. You work hard to provide for them and meet their needs.
One day, a govt official turns up with a stranger and his family. He informs you that this other family will be sharing your house (space), and you will be providing for their needs (money). None of them are able to do any work nor help you with yours.
What would your own personal reaction be to this? You are sacrificing your space and income, and you might question what the purpose of keeping this other family alive is?
You are the only person able to produce something, they produce nothing.
I can't see how this plays out any differently when the elites control all production and resources, and have no need to maintain a human workforce any more.