Dear savedmetwice,
I definetely don't have a pessimistic view of the unconditional income, because I define the workings of it differently than you. For example:

"Once the govt wholly controls your pay, your self-worth or selffullfilling will plummet, after all why bother trying to be better if you can't get more for your efforts."

Even if the government pays you an income just for being a citizen, you can earn additional money by working. It just adds up. So there will be people who don't "work" (meaning for money), but everybody can. The very good thing is, you don't have to, but can invest yourself by studying and educating yourself, which is very much needed in our fast developing world.