I think you might be missing my point. Yes, the US has a very unique setup regarding population, infrastructure and demographics. This all adds to it probably being the most difficult country in the world to govern well. However, there is a HUGE difference between "difficult" and "corrupt", and the problem right now is NOT that it's "difficult", the problem is that it's "corrupt".
The majority of politicians in the US are more concerned with perpetuating their own worth and longevity in office, and appeasing their higher financial backers, than governing well. They are more concerned with blocking members on the other side of the aisle, than representing the best intentions of the people. The Second Amendmant is now LESS about "Freedom", and more about "Profit". The American Health and Education systems are LESS about serving the people, and more about "Profit". The American Military is now LESS about "Protection", and more about "Profit". Money is the driving force of the people in power in the US, and they have set it up so well, and so powerfully, that it may be next to impossible to change.
Rylant