Learning and doing their jobs. Also, they need to smile and be polite towards customers...stop being so rude with hateful looks
Why do you feel undervalued and what would make you feel better about your compensation?
I pull my weight, plus more! I would feel better compensated if I only had to the job I got hired for, and not everyone else's jobs too, just because they want to be lazy or don't know how to do their job.