To me, the crux of the problems facing America have to do with free speech. America values freedom and liberty above all else, but this also means allowing the crazies to speak out and affect the vote. The reason why I mention the Falun Gong is because they are almost the same as the Church of Scientology, except not having such a large base. In America, you value freedom of religion so much that the government allows such religions to exist, because shutting them down would mean "the end of freedom" or some crap like that because of the slippery slope fallacy. The same also applies to politicians like Sarah Palin who take up the airwaves without doing much, because shutting her up would be a step on the path to full censorship of political messages. The Constitution also places an emphasis on protecting minority groups from being persecuted and having their voices drowned out by the majority, but in the process, don't you think that this affects the vote by not making it truly representative of the population as a whole?
And on another tangent, corporate America. Back when the country was founded, such things as multinational corporations with production, refining and marketing all in different countries didn't exist yet, and thus the Constitution does not have much regarding them. Multinational corporations are essential to the global economy, insofar as they facilitate international trade. But on a countrywide scale, such corporation have an undue effect on the political scene. In America, this is prevalent beyond simple corruption, because commercial sources are allowed to donate money to running a campaign, and of course MNCs have a lot more spare money than local citizens' groups. I think it is safe to say that all political candidates have to take the backing of corporations to even have their chance at winning, because their opponents also do the same. Once a candidate reaches office, he has a debt to repay his corporate backers, in the form of tax cuts, unfair legislation, etc. In effect, America as a whole has little say on their ruling classes, because their corporations drown their voices out with money.
And on yet another tangent, the American military. The American military as it stands now is unsurpassed in technological effectiveness by any other in the world, which makes America thinks it has an obligation to 'keep the peace', by inserting troops into unstable areas. I'm not going to talk about the effectiveness of such tactics, because I don't know much about that. Instead, I'll talk about the wisdom of stationing soldiers in faraway places without immediate benefit. To the American public, it seems like the army is stuck fighting an unwinnable war overseas that has no end in sight. While American soldiers overseas are providing tangible benefit to the stability of the region, to the populace it feels America always has a war to fight somewhere. By now, American forces are so essential to world stability that pulling out would likely cause a war, especially in the Middle East and on the Korean Peninsula. In short, America has irrevocably locked itself into a spiral of ever-increasing troop deployments and defence budget increases without end.