Another aspect of this is we (i.e., americans) often describe our differences as racial differences, when they are actually socio-economic-status differences. This is rather easy to demonstrate empirically, and I've published some work in this area.
I've observed that from the LE side lots of times. The people who can least afford the cost of the system are the ones who pay the most into it. Of course I have a hypothesis regarding how much of it is self-inflicted, i.e. poor decision making and life coping skills.