>UBI is a redistribution expense, that means, the government takes taxes from richer people, and distribute it to everybody.

It does not have to be. I take a Georgist view of the topic which when applied to UBI can create system based on Commons Rent.

Commons Rent would be fees on Natural Occurring Resources things like Extraction of Minerals, Forests, Fish. Fees on EM Spectrum (our current model of "selling" the EM Spectrum needs to end), geosynchronous orbits, air corridor usage (which can be very profitable in the coming age of Autonomous Drones). Pollution fees aka carbon taxes or other such fees.

Included in that would be Land Use Fees, and many other things not listed herein

It does not have to be a "take from rich, give to the poor" situation, it however does change the traditional attitude of natural resources as the marketable private property of the first person to discover them.

>Retirement is an entitlement pyramid, that means, people pay the government for it to take care of older participants, and by doing so they get entitled into receiving something in proportion to what they paid.

No it isn't. Retirement benefits have nothing to do with 'paying in' or 'investing' or some sort of 'fund'.

> Retirement is an entitlement pyramid, that means, people pay the government for it to take care of older participants

This is news to those who retire and live on investment income.

In the US at least, almost half of elderly would be living in poverty but for social security. Most are not retiring and living off of investment income.

That does not detract from the truthfulness of my statement.

Investment income depends on a functioning, growing economy.

Even just maintaining stored retirement wealth depends on this. Think about prices for services when there are large numbers of rich retired people with needs, but few young people willing to provide them.

The answer, of course, is automation. Granted, a ton of thing may just not be possible with robots. But I expect that, just like Oil was the resource that boosted humanity, AI (and modern medicine) will be the resource that comes to aid the elderly as demographics rapidly change.

It does not depend on a functioning, growing economy at all. TIPS and Series I savings bonds require the U.S. Govt to not default on its obligations. They preserve purchasing power.