When asked to choose between a single work-sponsored lunch or a permanent raise , why would you ever choose the lunch? It's a long-running joke that companies love to provide pizza Fridays instead of doling out much-needed raises (which could, in turn, let employees buy their own pizza, or you know, more important things in life than that). The company only has to shell out a few hundred dollars for a pizza party, and it does raise employee's spirits for a few hours while their stomachs are ful…