There are always exceptions.

Well i think you can find a decent amount of correlation to go between food and jobs, on top of what i already said, a person with a really good job would much more likely eat delicacys and luxurys, a person with a crap job thats hard work will want something cheap and quick...

Its not a huge correlation but more than an exception to the rule i think, someone well read on this type of thing could probably make a rough guess at the type of job someone has by looking at thier diet. the wieghtlifter giving himself away with his muscle foods, the ceo exposing himself via his luxury coorporate lunches including all kinds of delicacys, the factory worker who can't be bothered to do much more than stick something in the microwave or grab a burger on the way home... not a huge correlation but a fairly decent one...