ok , so if they're on 18.5 k , it'll only take a thousand years , assuming theres no interest on the debt
The point he's making is that the next job to go will probably now cost less than £100 to replace by leveraging the new bot capability into a marginally different role or by scaling up the hardware / software.
The point he didn't make but could have, is that this could be a very lucrative side business for Voda, in the same way that AWS was for Amazon (and it's now most of their revenue).
Automation is coming, and gnashing our teeth & wailing isn't going to help. We either need to structure society for population reduction (and if AGW IS real then we have to do that anyway), or we need to move people up the education scale into harder to replace roles. Or both.