I think the high ceilings probably have a fair amount to do with having lots of money. Having requirements for citizenship is a good thing, but some of yours are fairly arbitrary. There is a difference between needing to conform and needing to integrate - the latter being a worthy endeavor. Like EyeShotFirst says, we have many kinds of people. The Amish have never conformed! I don't think forcing people to give up their heritage helps.
The way I look at it is: people want to come to America, cool, how best to we regulate that? A preference on people with skills is good. Showing comptency in English is already generally required.Mostly, I don't see what dangers lurk in a multicultural society - even if people have a distorted view of what a multicultural society looks like. I also think Politics is sufficient to encompass all the comments.