Their problem is that they perpetually need to replenish the underclass as it becomes depleted by people pulling themselves up into the middle or upper class.
Yes, but they have been working hard at stopping that with significant success over the last six years. The most interesting thing is that despite the actual evidence people believe this has happened despite the Democrats best efforts rather than because of their efforts. The Democrats say they want to help the poor and downtrodden and people take them at their word despite the constant evidence of the results of their policies.
The only way to find someone who has no 'preconceived position' is to find someone who knows nothing about the topic.
Not really true. Plenty of people know nothing about biology and yet have plenty of preconceived notions about evolutionary theory. The only people without preconceived notions would be newborns.
No, it is definitely true. The person you replied to did NOT say that someone who knows nothing about the topic would not have a preconceived position, merely that ONLY a person who knows nothing about the topic MIGHT have no preconceived position.
My experience is that most of the problems with our current system are a result of things implemented in the name of "a new economic structure". Things which just made the problems they claimed to be designed to fix worse.