I put down experiences from before med school. The 2009 NRMP stats showed that applicants had, on average, around 2-3 work experiences. Are you meaning to tell me that the average student had 2-3 jobs during med school? Other than the occasional bartender, I didn't know anyone who has had a job during med school.
As for research, the Dean of Student Affairs at my school said to not bother listing undergrad research. There were classmates of mine from years before who had killer undergrad research, though, and little to no med school research. You better believe they listed that research. Based on how well they matched, with all things considered, I'm sure it helped, too.