Anywhere you go in the world your going to have at least two types of people. You have the ones who spring up every morning at 5AM and are looking forward to the day, whether that be work or educating themselves, and then you have the ones who cant seem to get up until 10 or 11. OK maybe not as drastic of an example but you get the idea. Some personality types are meant to be successful and leading edge, others are meant to support, other types are followers, other types are just lost until someone helps them go the right direction. Thus, you are always going to have your rich and your poor. This whole thing about poor people in the US is overblown.
So what? there is a side benefit to being poor and that is that it makes you want more. It makes you want to try harder. It gives you hunger, It makes you want to advance when you see other people who are wealthy around you and you are NOT. This doesnt mean you need to hate the rich.... That my friend is a Marxist Ideology... that you have to take from one to give to another.
But in the United States, the poor do not have to remain poor. that is one of the great things still about the US. pretty much anyone can still go to college, and pretty much anyone can be very successful if it is within themself to do so.
Example
Who is Joe Lacob? Everything You Need to Know
This guy is a billionaire who started out poor. Now, if he lived in a Socialist country where he and his parents were always kept fat and happy then he probably would not have accomplished all that he did.
You might argue that it is better to keep everyone closer to even... no one really rich.. and no one really poor. Well, as people have already pointed out, the poor here in the US are still way better of than most countries of the world... and again, they don't have to stay poor. In the US there is always hope to advance. For those who dont like the way the US is , I say, don't try to change us into a European model, just move to Europe where you can feel comfortable and safe.