I was going to give you a "thumbs up" until I read # 5.
Change #5 and you'd be back to the Welfare system of giving according to need rather than giving equally to all. So what would be the advantage of guaranteed income?
The number of kids determines the amount of Welfare paid. That rule should apply to seniors on pensions too then. Some pensioners need specialized treatments that are not covered by Health care so why shouldn't those seniors get a higher pension?
That's where these 'equalization' plans run into trouble. The usually cause more problems than they solve.
Would guaranteed income be paid to every citizen, even the well-off, like the 'baby bonuses' were? If not then we'd be back to the old days when seniors had to pass a means test to qualify for old age security. There's be a lot of screaming over that!
Would guaranteed income be paid by the household or by the individual? A married couple each receiving guaranteed income would provide a higher standard of living than that of a widow living alone. Not fair! If the widow receives the same as the married couple that's not fair either.
What happens to the person/family that spends all their guaranteed income on beer, bingo and lottery tickets and ends up broke before the next payment is due? You know that would happen in some cases! Does the person/family then demand and get more to tide them over?
Government would be faced with those and many more questions and the whole issue would end up an unfathomable dog's breakfast like most government endeavors and would create more bureaucracy besides.