I think a binding method of enforcing voter decisions upon the elite is a lynch mob and a lamp pole. That's just me though, Flint, MI, would have had their government overthrown a hundred years ago if they decided to poison their own citizens through negligent policies. Given the sheer disproportionate influence of elites, claiming the trivial obstacle of committed delegates to selecting a nominee is undesirable is absurd. https://www.washingtonpost.com/opinions/2020/02/18/fix-primaries-let-elites-... Preference primaries could allow voters to rank their choices among candidates, as well as to register opinions about their issue priorities — like an exit poll, but more formal and with all the voters. The results would be public but not binding; a way to inform elites about voter preferences.