I am not so sure it is far from its intentions. The founders knew and expected most politicians operating as fronts for various groups and making bad faith arguments and backroom deals. That is nothing new! Most of what they did was try to prevent the government from being wholly brigaded by one minority perspective, and if so it would be moved along after a short time.
So far, so good, despite warning signs to the contrary. Spielberg's "Lincoln" is particularly clear about displaying this dynamic at the country's most fractured moment.