They exist in a tiny social and professional circle of people and have spent most of their careers having ideas about things (in right wing think tanks and in right wing newspapers) but never really having to deliver anything.
Both Kwarteng and Truss have very mediocre careers in the private sector - he was undistinguished during a brief stint at JP Morgan and then went to work for Crispin Odey's hedge fund (odey just made another fortune this week shorting the pound)
They really believe they are clever and their ideas are so superior that they will win. They also have no idea how anything works in the real world.
Their ideas include a radically smaller state - eg much less state provision of services like health, education, social care, benefits, etc. But they can't achieve that by just gradually cutting over time (the Tories have been doing that over the last 12 years)- they are seeking a radical sudden cut in state spending (in order to balance the debts they have started running up) in order to achieve their Utopia.
They also want to cast off restrictions on planning, employment rights, consumer safety, environmental protection - you can read about it in their writings....
In the olden days, it was the left wing that was thought to be seeking to achieve a Utopia.
Turns out the most ideologically driven loons are the Tories.