Trilarion: The problem is the electoral system. With only two options it's clear that voters will favor them alternatingly. In the end, both parties wiill arrange themselves with this arrangement and there is no incentive to become better. They know that now the other guys get the well paid jobs but in four or at the latest in eight years it's their turn again with extremely high probability. For the sake of the game they do a little shadow boxing but that's not even real.
The only seat that really gets swapped back and forth a lot is the Presidency. There might be a 10% to 20% turn over in the house, or 4 or 5 seats in the Senate in a big year, but most of the seats will stay with a given party. In any event, they are
all pretty well paid... :P
Trilarion: Just abolish the majority voting system and adopt a proportional voting system with some direct votes (40% of the seats could be direct seats for example, possibly some compensation seats neccessary but that's no problem). It would be much more democratic in a way that really every vote counts for something and that you really need a majority to form a government, not only being the strongest party.
Alternatively, we could go back to the way the system was actually designed. Decentralize the federal government a fair bit and let each state have a greater hand in their own governance, just as our Founding Fathers envisioned. A majority vote wouldn't be as powerful at the Federal level if each of our states had a louder voice to enact reforms or policies on their own.
Just saying that there are other options than copying your system ;). On principle, I don't like systems that automatically assume that we should have a strong central government for everything. Generally, unless it involves national defense/diplomacy or interstate commerce (currency and such), I would rather the federal government kindly butt the heck out.
The USA is big and diverse; what works in European countries may not translate as well to the U.S. situation. I think our country would benefit more with a system of governance that starts locally and regionally with bottom-up policies, rather than a one-size-fits-all federal policy.
(Just as a note, because I have noticed many Europeans don't fully grok how large the continental U.S. is in actuality, I'll make a simple example. If you were to place a map of the U.S. over a map of Europe, such that Seattle, Washington lay over London, England, then Miami, Florida would be within 100km of Baghdad, Iraq. I only note this because
every European that I know who has ever visited the States has remarked that it was much bigger than they had imagined.)
Edit: What I suppose I am saying is that I think it would be better if the USA were similar to the European Union, and each
state here could be treated similarly to each country in the EU. I would actually rather a somewhat stronger centralized governance in the US than exists in Europe, obviously, but I do like the symmetry of the example.