Quote from piezoe:
Yes, I agree fully with you that it is our Congress that has really let us down. [/B]
Congress hasn't let "us" down. They're doing exactly what every congress does. They represent the people who elect them, all while skimming off a bit off the top, of course.
The problem is the country is too large and too diverse. The larger a country the harder it is to govern properly. Every diverse country faces the problem where groups fight for government favors while disregarding the well-being of the state as a whole.
This is discussed nicely in: The Elusive Quest for Growth: Economists' Adventures and Misadventures in the Tropics
There are only two ways to counter this trend in a country that lacks unity.
One is to form policies autocratically rather than democratically and to have a leadership that is not totally corrupt but actually cares about the state. This will never happen in America. This is basically what China and other E. Asian countries have right now to varying degrees.
The second is for a large external threat to force diverse people into alliance. China could provide this but it's unlikely as they are very cautious and know they must keep under the radar at least until they hold clear dominance over the West. You don't see any of the Soviet-style blustering from them.
On top of those problems, the US is experiencing a terrible demographic trend where the marginally productive, who at best could contribute in a factory or simple service-based economy, are out-growing the productive by a ratio of 6:1 (when you look at the number of offspring, the age of reproduction, and immigration).
This wouldn't be so bad 100 years ago. But with today's technology, many of those people will go from marginally productive to completely useless and have to be merely supported.
China (and most of the rest of E. Asia) understands all these things and is pragmatic about them.
While your characterization of the Republican party is apt (mostly groups chasing their interests), the Democratic party might be in a worse condition. They're led by idealists, who though arguably have good intentions, will not face today's realities. The back-end of the democratic party, just like the Republicans, is just another coalition of widely different groups chasing separate interests.