Oh and another thing.....
They do actually think they are visionaries.
They are rehashing Thatcherite policies from the the 80's. Think about it. They are saying that the policies that will work in the 2020's are the same as those from the 80's. That is like Thatcher deciding in the 80's that what was really needed was the economic policies employed in the late 40's. Or Blair deciding he needed to get back to the 50's economic model.
Even worse, they aren't even promoting these policies. They go balls-out on the Laffer curve, low tax bollox, but appear to completely forget that a fundamental part of Thatcher's philosophy was the opening of markets to allow competition and a route for expansion for sucesful companies. Which was why she was all-in with the single European market concept.
In conclusion, Truss and her idiot band of backers think that the solution is to take bits of an economic philosophy from over 40 years ago, rehash the bits they like whilst ignoring the bits they don't, ignore economists that point out it is a shoot idea, and then think the reason their stupid ideas fail is not because they are stupid, but because they haven't been allowed to do them enough.