I'm personally confused with some of the America-bashing that's going on in this thread, having lived here my whole life. I agree with the fact that there is a lot of corruption in some circles, and there's a lot that we don't know about that goes on behind closed doors. I also know that we have mass media outlets like Faux News, MSNBC, or CNN that don't really report any of the actual news and provide a complete view of the story. It's not a perfect place, all-in-all.
But I mean, the average person in the United States has it pretty decent. We've got the freedom to do pretty much anything as long as it doesn't harm others in some way, and have most of the essential freedoms (i.e. freedom of/from religion, speech, protest, anonymous voting) Maybe we don't have welfare quite as much as most of Europe, but we do have unemployment benefits and tax refunds for the poor, as well as limited medicare. For the most part, you don't have to fear the government kicking down your door randomly, or being unlawfully jailed or prosecuted unfairly. Corporations do have a lot of power, but as for the everyday person this doesn't mean very much.
I don't think that it's very bad living here, I actually think it's pretty great. I wouldn't call it the best government, or the best country to its citizens, but it's certainly not the worst. As for the claim of "If you don't think police are flagrantly abusing people in the U.S. every single day, you're not paying attention." That's just downright preposterous. You just can't make a wild assertion like that and not back it up with actual evidence.
I can't answer the topic's question, because I don't know enough about all the other countries in the world. But I don't make claims about other countries when I don't have any clue what I'm talking about either, which is probably a better choice.