Also from Ian Dunt's live-tweet thread:
Says Johnson said he agreed. "Chaos isn't that bad," he said, apparently. "It just means everyone has to look to me to see who is in charge."
As a Trump-watcher, this leapt out at me. In the crash-course I put myself through on authoritarian demagogues of the ages, one thing I learnt is that in-yer-face lying and creating chaos are important tools for wannabe dictators in creating their personality cult.
The authoritarian deliberately degrades the concept of external, verifiable truth and removes structure, to create a vacuum in which s/he can become the source of all Truth and Order. The more that certainty is destroyed, the more followers have to cling to their leader personally as the source of Truth, Order and Comfort.
I don't know whether Johnston really did say that, or whether Cummings decided that was a good lie to tell. Either way, someone is working from the Dictator's Playbook.