What you have written looks really interesting... but I am curious as to why you think this is not already in effect? Just thinking about Ireland, UK, Germany, Canada, Australia... the minimum income concept is firmly ingrained in unemployment benefits and means-tested social welfare. It needs a lot more to really restore equality, because equality of opportunity requires investment in education and rules against monopoly and nepotism/cronyism, but they are there too!
As a german who grew up in Eastern Germany i can tell you that the only thing stopping a full base income is influence from american politics. I say full, because we do have a de-facto base income with the unemployment payments labeled "Arbeitslosengeld II". Read up on it. :)
