No Governor Issue 4 includes an essay by Robert Anton Wilson, "A Few Blunt Statements About Neuro-Economics." The article appears to have been written during or after the time he had to go on welfare to support his family, and it appears to give the reasoning behind his advocacy of a basic income guarantee.
Before I posted the PDF, I emailed a copy of it to Arthur Hlavaty, because I noticed the Shea's zine reviewed a zine Arthur had published about 30 years ago. About the RAW essay, Arthur commented, "The Wilson essay greatly enlightened me when I first read it, with its image of money addiction. RAH and RAW turned me on to libertarianism and showed me why it doesn't work, Heinlein with "Man, as a social being, cannot escape government any more than the individual can escape bondage to his bowels" and Wilson with that."