Unemployed middle class people who suddenly have a lot of time on their hands -- more than job hunting can possibly consume -- not to mention that many people mope around a bit (dealing with a kind of minor depression) just after fired and take a couple of weeks to get their mojo going again.

I think the "middle-class" comes from the fact that such people have cash savings to weather a job hunt, whereas people without savings have to start working pronto on whatever if they're going to be eating and roofed in two weeks.