US Politicians on both sides of the aisle argue in Congress, but they care about the poor, when they meet at the local charity get together at the Hamptons - Like Kerry and Biden millionaires that represent the poor?
The political process in most countries skews towards wealthy candidates. There are some exceptions of course, but generally this is the case. I don't think it's intentional I just think thats a side effect of who runs and who people tend to vote for.