The United States is, and always has been, a plutocracy. Legislators and the Executive are elected, but they take election campaign funds and, in most cases, personal benefits (the use of corporate-owned executive jets, fishing lodges, plus after-office directorships, consultancies, book deals, etc.) from the moneyed interests. These payoffs are absolutely guaranteed, not because the paymasters are honest or inherently trustworthy, but because they have to convince the next lot of office-holders that they will get theirs. Moreover, the same interests fund both parties. Thus, when a Money-Power-controlled Republican or Democrat gets the boot from the House, the Senate, or the Oval Office, they are replaced in the House, the Senate, or the Oval Office by a Money-Power-controlled representatives of the other party.
This system of government is not necessarily all bad. It insures that the ship of state does not veer crazily from one direction to another with every turn in the electoral fortunes of the ruling political parties. Moreover, the legislators and the President are elected and thus do no doubt endeavor to do good to their constituents, or at least to appear to do good to their constituents, so far as that is consistent with loyalty to their financial backers.