As a college student, I suffered from missing the latter few seasons of Star Trek: The Next Generation, which I had watched as a kid each Saturday evening at 7 PM, without fail. I was the only Trekkie in any household I knew, and was just lucky that folks tolerated this monopoly of the television each Saturday in the prime of prime time. It was not until I reached college that I would find a field and flock of comrades, yet had no time to actually see prime time TV.
Since Star Trek is another apocalyptic fantasy where humanity nearly destroyed itself, in our recovery, humanity has banished money and poverty by extension. This seems to explain the apparent lack of class diversity. Yet, I watch the episodes then and now, and each series reflects a very clear picture of how America projected its dominant caste fantasies concerning gender, race and class at the time.
All other forms of inequality are assumed to have been eradicated alongside most diseases. In the Star Trek universe, however, equality was really a project of assimilation just meant that everyone had some strange fusion, futuristic sense of morality that only differed by planet. It has taken President Obama to call the question of assimilation into question and value difference beyond PC jargon.