Certain careers are shown as posh, while others are shown as crap. This can affect people's choices in career pursuits. Take a CSI mortician for example. Such a career used to be seen as dirty and dreadful, now it's cool due to some TV shows and privatized community colleges that train CSI's are proping up everywhere.
Another example, in the opposite direction, is being a mail carrier. This is a great career where you can get well paid and walk around, but the media portrays this job as undesirable.