Mark Knopfler wrote that song on the spot listening to some guy in a hardware store that also sold tv's. Here is a quote: "The lead character in ‘Money for Nothing’ is a guy who works in the hardware department in a television/custom kitchen/refrigerator/microwave appliance store. He’s singing the song. I wrote the song when I was actually in the store. I borrowed a bit of paper and started to write the song down in the store. I wanted to use a lot of the language that the real guy actually used when I heard him, because it was more real. It just went better with the song, it was more muscular. I actually used..." the rest can be read in the link, but it is NSFW