The abolition of work is one of the most important political essays after the situationist international. It was published in 1986 and also published in over 30 languages.
While what you want from Black is hard data, he wants from you to think and discuss. It's not a post in a blog, it's not a paper, it's an essay and that's what it aims.
Changing because this guy talked about something on his blog isn't certainly the thing I want. Funny that that's exactly how real-life politics works: just people talking with little backup of actual data.