>knowledge of humanitites, science, technology, history, finance, and law, and be vetted with a background check filtering out criminal behavior, tax evasion, etc.
Who would remain ? What would be the incentive to train for this, besides money ?
Self-actualisation should be about doing the things that only you can. Not better than anyone else, but more like, the specific things that ony you, with the same of your experience, expertise, values and constraints can do.
Please, don't bring the state into it. I don't want to speedrun the 1984 ending.