It's shock doctrine at the scale of a single company. This, along with the elimination of the old guard leadership, will destroy any lingering anti-Musk factions. It will save some money on salaries too.

It's not a great experience for Twitter staff, but it's a rational approach from Musk. It paves the way for him to radically alter Twitter's culture and agenda, if he chooses to do so (and may already have done so).