In short, the problem of this country (and the world as a whole) is the reliance of the socioeconomic system on perpetual exponential economic growth which clashes head on with the very real limitations imposed by the laws of physics on a finite planet. The current crisis is the ultimate consequence of the world reaching the peak of conventional oil production in 2006.
Ron Paul is compeltely clueless when it comes to this and his positions on issues relevant to it are only going to make it worse.
That's the major reason why Ron Paul should be dimissed as the village idiot type of figure he is, he is not much better than Perry, Bachman, Gingrich and the rest. He has principles and they don't, you have to admit that and even admire it to an extent, but this does not change the reality that he is completely ignorant of the real issues that need to be tackled.
BTW, there isn't really a single mainstream politician anywhere in the world right now that shows signs of being much better. But, again, this is hardly a reason to be a Ron Paul supporter, it can only be a reason to feel very depressed about the future of the world.
In addition to that, even if we didn't face the collapse of civiliation due to overshooting the carrying capacity of the planet at some point in this century, libertarianism is still a political ideology that can only result in disaster if implemented. Because just as the the fact that the laws of physics do not allow for infinite economic growth is completely ignored by libertarians (not just by them, but htey do it too), the biological nature and biobehavioral characteristics of the human species are completely ignored too, and if you build your ideology on a misguided understanding of human behavior, nothing good can come out of that.