That is nothing like an unconditional payment to every adult regardless of their work situation. That's why no one has mentioned it.
The concept of a basic income seeks to replace the variety of welfare/support payments a country has. In Australia, that would include Newstart, Austudy, Abstudy, veterans payments, carer's allowance, disability, pensions, etc. You would get the basic income even if you chose to work as well.
Surprises me that in 400+ coments there is no mention to it.