That only works if you have a government willing to limit government power. Otherwise the letter of the constitution will be preserved while everyone in power do basically whatever they want.
That’s true of every conceivable government. Political office is ultimately a position of power and so those who have it seek to maintain and expand it, but I think we roughly have the right mix of institutions serving the right functional roles, but the powers given to Congress could use a textual update, and a right to privacy more clearly spelled out to account for technological and international diplomacy changes that have occurred since 1789.
> I think we roughly have the right mix of institutions serving the right functional roles
This is also an opinion commonly shared among people living in a country. Otherwise you either have a dictatorial state preventing people from leaving/reacting (keeping them dirt poor being an option for that), or the people rioting in the streets for months until something breaks.