This being a weekly columnist in The Guardian, a newspaper whose journalists are almost all upper middle class people who went to very expensive private schools (curiously callled "Public Schools" in the UK because theoretically anybody can send their children to one, if they can afford it) as are the editors and the board - so they're almost all from roughly the top 11% of the UK population wealthwise - I expect that her real problem with these present day overlords is that they're neither posh nor English.
If they had the kind of "proper" manners, soft discourse, cultivated look of detachment and posh dress sense that are taught at the "right" schools, they would be alright.
You don't see this kind of critique there against posh English super-rich (especially not "old money"), even though they're just as sociopath as Elon and Zuckerberg.