Modern Family (2009-present)
How can Gloria and Jay live in this house, in Los Angeles of all places, and afford to do practically anything they want, yet he just sells closets (and Gloria does not work)?
In 2017, the only show I can think of that really discusses, or at least subtly emphasizes, issues of class within a family dynamic is ABC's The Middle. This series takes place in Indiana, highlighting the lives of Americans that reside in normal, "middle" America. This also relates to the argument that Hollywood doesn't pay attention to the average American, focusing solely on people inhabiting the coasts (New York City and Los Angeles) and lives of the rich. Yet, this is a show on primetime ABC that obviously is not about people similar to Modern Family's extended group of characters. Interestingly, The Middle came out the same year as Modern Family, making them competitors for the "must see" family comedy on ABC primetime.
ABC's The Middle (2009-present)
Overall, I find it interesting that American television does not want to really discuss or emphasize class politics and issues that so, in fact, effect many American lives. We love Downtown Abbey (2010-2015), but we seem somewhat ambivalent about discussing anything similar in our television programs.
I'd love to hear if anyone else can think of modern (i.e., twenty-first century) television that discusses class.