OP can be rephrased to ask why it is Big Business rather than People that have political power in U.S.A. A big part of the answer is the unfortunate removal of legal restrictions on media power and campaign financing.
There are also mindset differences between Americans and, say, Europeans. In discussions of public-financed health-care, Europeans often advocate altruism. When the topic comes up at SDMB, I’ve yet to hear a Doper who has health insurance discuss anything but whether his/her own health insurance situation will be improved by a government program.
Americans tend to have excessive faith(*) in Free Markets. Recently I complained here that Al Jazeera is probably a more objective news network than, e.g., CNN and that it was too bad it wasn’t more readily available in the U.S.A. The only response was “If there was a market for it, it would be available.” (Whenever I hear that TV provides people that which they in fact will watch, I’m reminded of the deer transfixed watching oncoming headlights. :dubious: )
There are other examples showing how a unique American mindset affects politics, but that would be a topic for another thread.
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- Several years ago, there was an article titled The Market as God, of which a version is on-line.