I get my view of how the lower class is treated by the cops, from watching the TV show "Cops".
Understandable, then why you hold your views of the poor.
Generally the poor are poor because they make bad choices.
Some people, true, but not generally. If you're raised by poor parents, you're up against a very big wall. It's hard for them to buy school supplies, and if you're raised by a single parent it's harder for them to help you because they're probably working two jobs. Having a single parent is the result of a poor choice, but it wasn't your poor choice.
And a poor kid can forget ever attending college.
People who have bills to pay and have to go to work in the morning don't have time to be out causing trouble.
Most of the US's poor work, and are not criminals. But the cops still treat them as criminals; hell, society itself does.
Those folks working at McDonald's, WalMart, the corner convenience store are all on food stamps. That friendly face you see at the checkout counter is the face of poverty, not the idiots you see while watching "Cops" (that show is government propaganda, BTW).
So we are a classless society, in that you're not stuck in one socioeconomic class no matter how hard you work.
Rags to riches is extremely rare and takes a hell of a lot more than hard work. My late uncle was one of the exceptions. Creativity and hand-eye coordination runs in the family, and a stroke of bad luck was the best thing that happened to Dan.
He was injured in WWII in the navy, and became friends with a fellow patient in the hospital who had lost a leg in the war. The army gave him a prosthetic, and Dan saw it and said "I can make a better leg than that" when his friend showed him the new leg, and he did. They went into the prosthetics business, and all it took to sell one was for Dan's partner to talk to a recent amputee, who would invariably say "What could YOU possibly know about it?" All he had to do was pull up his pants leg and it was an instant sale, because you would never know that he was missing a limb.
But there were so many lucky breaks, including genetics, that his rags to riches story (both sets of my grandparents were poor all their lives) would not have happened had a single thing, especially meeting his future partner, who was a born salesman; that's something that doesn't run in the family. We couldn't sell a ten cent hamburger to a starving man.
The fact is, if you're born poor you're almost certain to die poor, and if you're born rich you're almost certain to die rich. If you're born middle class there's no telling; you could die rich, middle class, or poor.
If this society is as classless as you say, then why did no one spend a single day in jail over the banking crimes that brought down the economy? Why did no one from Sony go to prison over XCP? Why was OJ Simpson "not guilty"? Do you think a poor black man would have been treated the same? Hell, a poor white man would have gone to prison under those circumstances.