His argument seems to boil down to the following:
1) Labour being replaced by automation isn't going to happen because it is going to create more jobs than it displaces..... Not sure if I agree with this point.
2) That a basic income necessarily needs be IN PLACE OF existing welfare and labour protections... While some other forms of welfare may evaporate and some labour protections loosened, it doesn't have to. It provides flexibility for labourers and employers to negotiate without the looming threat of not having a basic living wage. It increases the labourers negotiating position more than the employers IMO.
3) Technology makes us more productivity, which means we can work less hours which means we can have more leisure time. The problem with this argument is that it assumes those "less hours" are equally distributed across the entire pool of laborers. What it just means is there are less hours for a limited pool of skilled labourers to fight over. Which means more unemployment. It does not mean that the taxi driver who has his 12 hour days eliminated by driverless ubers now gets to work 3 hours a day driving an uber or gets to work 3 hours a day programming those cars.
4) Instead of having a UBI, we should have a militant (violent) revolution against the rich where we demand increased welfare and labour protections. Increased welfare like a UBI? I'm not sure why the author feels like positive social institutions can't be a voluntary concession of the rich to satisfy discontent of the masses. Why do we have to get out our pitchforks to get bread if they are offering to hand out a livelihood to every citizen?
This sounds like the sort of leftist rhetoric that comes from someone in a very comfortable position. Try telling someone in real need that they shouldn't accept a basic income because "it's just a bribe from the rich so we don't start some vague revolution!".