Whether this guy is serious or not, the attitude of looking down and judging that shop assistant as stupid, or implying that a job in a shop is somehow a bad thing ('you can ONLY get a job in a shop') is aweful. I have spent 4 years working in a bar and a cycle shop being judged and talked to like dirt, usually coming from professionals, because they have this attitude.
Now I'm a professional, and the way these idiots refer to these apparantly lesser people really gets my back up. I wonder if they have ever had to work for minimum wage…