I encourage you to attend some meetings of your local party Republican or Democrat (whichever is dominant) and see how the people you get to elect are chosen. What you'll find is the folks controlling that process are deeply under the influence of a status quo and that most unorthodoxy there is very quickly marginalized.
People who have been involved in politics and have experience with budgets and governing SHOULD be the ones making decisions.
Next time you get heart surgery, ask for the fringe thinking fresh college grad and see how that goes.
IMO, this preference has lead to a clear preference for statism and state violence amongst our elected officials as the people who rise through the rabks tend toward an implicit trust in the institutions of the martial state from the criminal justice sysyem to a standing military.
And in my experience this has a lot to do the low level party operatives whose hands are on the scale at the primary level.
How many marginalized people actually ever make it into office? Virtually none and so that is a perspective that is completely unrepresented. It's stalwart statists all the way down, they mostly just disagree on what the state violence should be used to enforce.