the original US Constitution was very amenable to neocameralist restructuring. in fact, pretty much all was already in place, except for the language.
voters were property owners (the closest you got to a real shareholder) who elected a board of electors to point an executive officer. the federation was a consortium among States for mutual protection, so we had corporate representation (Senate). the Congress, as the representation (direct and indirect) of proprietors/shareholders, controlled the funds that went to the executive office.
this is all pretty much in tune with corporative structure. the glitch was with Supreme Court and the whole ideological apparatus
instead of the CEO appointing the justices, I would make justice a single church-like institution with the aim of controlling the legality of shareholder actions. in turn, it would be controlled only by the executive branch’s decision on law enforcement.
Cathedralist institutions (universities, media) would cater to either justice-church sentimentalities or become themselves shareholders.
of course, late 19th century and FDR reconstructions of the Constitution made it impossible, but a neocameralist US of A was once possible.