It's great you began writing about this, but I would say with every respect, its a very deep rabbit hole, and where we are at in our journey is often very apparently near the start, as seen by others who have covered a lot of ground over a number of years, analysing it.

You are on the right track by spotting the value of simulation, its a must, but there are related things now maybe taking precedence, by themselves being more or less capable of doing the simulation, its Ai, at least the variation of it we might say is solar powered.

At the heart of all this is energy. If your UBI scheme doesn't fit with that or take it into account, since money is energy always, energy is its underlying intrinsic value in all cases, then it is physically impossible, it could only be a Ponzi at best.

To me it looks like there is only one answer, and it is already being pushed by nature in a way we will never stop it, its as natural as a plant being born from initial dependence on the energy of the planet, we seem to be doing this as a species, and we are at the time when the energy flow through us as a species has to change direction from negative to positive, and this will not start to happen, until we issue money representing that energy coming from the sun, rather than energy being drawn from the planet.

Its a crazy time, because at some point the net flow of energy through humanity has to pass through zero, to get from negative to positive, and we have to make this transition to stop the planet from burning, and to wind entropy back down.

These seem to be the biblcal end times, no less.

For a more technical analysis, check the link in my response to Remarkl's good comment.