Re: "Understand the technicalities in a way I couldn't do"
they didn't grasp exponential growth
It's as if they didn't want to grasp exponential growth. Call it compound interest on steroids – at least Sunak understands compond interest and Johnson's akways had an eye for an opportunity. Or say it's like hyperinflation turned up to 11 – Johnson knows about hyperinflation from his classics studies, he's used the example of Emperor Diocletian to argue that price controls don't work.
I fear Johnson's dream of being Prime Minister didn't include a situation in which he wasn't the cheery urbane hero, so he couldn't believe it was happening.