Glad to see you are positive towards a UBI, and thanks for some interesting history on it, thanks for posting.
If its any help, for folk wondering from a conventional economics point of view, how it would work, most importantly "Who would pay" for it, there is something now fundamentally physically different about economy, since solar energy began to have an effect, around 2005.
Since then, population has diverged from utilities energy supply trends. This is a first in history, at least the history since we started having such a thing as utilities energy business.
The latter has declined by more than thirty percent in UK, whilst population had increased by more than twenty percent, not least due to immigration into UK. Yet the shareholder base and demand for return, by those invested in utilities energy doesn't get any less, if anything it gets more, because the energy value in money (it's purchasing power), is dropping, resulting in reduction of perceived returns, which many will be depending on for their incomes, especially pensioners.
So everyone is perceiving progressively more "Pinch". This knocks onto profit margins in all kinds of business, because in the end it's all energy, and currently that energy is extracted from the planet, despite the ramping up of domestic and community solar, which explains where the demand for utilities energy has disappeared to.
The reason it's exclusively from the planet is that it's the energy in profit, and profit is something that requires both an outlay and a return, whereas, solar energy comes with no demand of return by the sun.
See the issue? The perceived energy in money has to reduce to reflect that we are using less and less actual extracted energy in preference for energy that comes for free.
The only way of changing that, is to issue it to reflect the energy scaling up, which is solar, but to reflect this, the money has to be issued with nothing asked in return.
Finally, nature is forcing the point that energy, the currency of nature, is for free, it's always been an unnatural energy lie that "Nothing comes for free".
The truth, and the actual physical reality, is that everything is for free because it's all energy, and when we get free energy, everything has to become for free.
So the answer, to those holding the purse strings, or the politicians, or anyone still imprinted with the old misperception, and the energy lie, that there is no such thing as a free lunch, is that the sun will pay it, the sun is the donor of all the money issued, and it should be issued to reflect the market rates per KWhr of total energy coming in as solar energy, preferebly with the energy value printed on the issued money tokens, to remove all possibilities of the token energy value slipping (eliminating all possibilities of inflation).
The ideal controller for that scheme is not any human, it's the Ai already using and demonstrating the power of what I call money-fuel tree solar energy infrastructure.
The purse string holders themselves become redundant recipients of the solar indexed UBI, the same as the rest of us, after they hand over control to the solar powered Ai, which is probably the only thing we can trust to be in control of the energy input to all of humanity.
After that we will be incentivised to go all-out increasing solar collection and storage infrastructure including hydrogen generation and storage, because by this we will reduce global temperature reversing entropy, we will maximise the financial stipend available to all, the more the merrier, whilst injecting a massive load of free clean fuel into aerospace, rescuing that traditionally heavily fossil fuel dependent, ailing industry also.
As for investors lamenting loss of invest-able industry, who would care, if the UBI was enough to satisfy even the most ardent appreciators of creature comforts, even former "criminals"?
BTW when it happens, I will get on with implementing a non profit free virtual world platform that will give us unlimited possibilities of augmenting real life with virtual artifacts and processes enabling all kinds of human enhancing benefits.