Power can corrupt, or at least bring out the propensity for corruption. From a purely humanistic standpoint, man serves his self interest, that is ingrained within all of us. It is only the domain of the truly unselfish to sacrifice of themselves for the greater good. To a degree, most of us probably have the capacity for self sacrifice for the greater good, but when you get right down to it, many would be more likely to self-sacrifice for the good of someone or something of great importance to them personally. Case in point, most parents would give up their lives willingly to save their children, even if they were informed that they personally would do more good for the world than would their children ultimately. That is love, and it is in our self interest to serve that which we love unconditionally. But take this same person and ask them to sacrifice their life to save a stranger and tell them that this stranger would have a greater impact on the world than they would themselves, and you would find FAR fewer willing to comply. Human nature.
Politics is by nature an illusory business. Rarely do people go into politics out of a deep desire to change the world. I have a deep desire to change the world, but knowing how our government is structured, I know that an honest man such as myself would never effect real change, there is simply too much of our government which has over time been ceded to the interests of corporations and the elite/powerful/wealthy. Because politics is all about appearances, and not about substance in the slightest, the whole political game becomes about convincing the most voters (not even the most people) that you are a better person than your opponent. That is why many people report they vote for the guy they’d most like to have a beer with….that is why scandals involving the private lives of politicians bring them down….it’s not a matter of picking the most competent, capable, honest, hard working person of integrity…it’s about picking whom you like the most.
So, because of this, people who really want to effect change, often end up trying to do so in smaller ways, doing things on the inside where they can see an impact…be it volunteering to build houses, serving on the school board, showing up at town counsel meetings to rally for a new stoplight, protesting the G8 summit, organizing and canvasing for someone like Obama who they see as the only hope for our nation, or going on Fluther and shooting off their opinions in hopes of convincing even a few people to consider things from a different angle. People like this by and large have no desire to enter the thankless world of politics, because really helping people in this world is a warm, human, real thing to do. Politics is about image and style…it’s not at all genuine, and it involves basically saying what you think people want to hear…honest people often don’t win elections because their opponents, not bound by integrity, honesty, logic or reason, can assail an honest person’s character in a number of ways, but the honest man will not engage in a tit for tat. This makes the honest man look weak and dishonest, and the dishonest man look like a strong defender of all that is good and right.
But even if you end up getting into a high position of power as an honest person, our culture relegates you to the sidelines. For example, in the Presidential contests, people like Dennis Kucinich, Ralph Nader, and even Ron Paul to some degree, really would be the kinds of people who would work to remove the money from the electoral system, but they’re relegated to the sidelines…no one thinks they even COULD win, so why should the press pay any attention to them (indeed they have a vested interest in keeping us in the dark, because they are owned by corporations who would not do well if a person who wanted to represent the people and not the corporations were to come to power). So either you have to make deals and cede some of what you want to be able to get other things you want done (see: Obama), or you say what you mean, mean what you say and end up as a Kucinich. Which is why the truly great people who really want to make us a better nation will by and large leave politics to politicians.
Politicians…the people who really get off on wheeling and dealing in a world where perception is more valuable than reality are the kinds of people who respond more greatly to matters of self interest anyway. They get into politics out of self interest, to stroke their egos, to feel the power. They are going to be the ones most succeptable to the corrupting influences of money and power.
So in summary, I think there are probably a lot of people with high moral standards in this country who could not be bought in most cases. Having said that, almost everyone has a price. But it is only those who are more easily corruptable than the masses who would seek out a career making decisions for others anyway, and that is what leads to the perception you’ve stated in your question.