i have a coworker that comes into work late every day and takes way too many breaks
How frusterating! Have you brought it up to management
i have told my supervisor countless times and she fails to address the problem
I can tell the frusteration in your tone. I would go above your supervisor since nothing has been done. Otherwise you will stay frustrated and angry. 
it won't help anything because management is so nonchalant about discplinary action at my job
Wow! I dont know what else you can do. Your at a dead end right now. How annoying!
i need my job so i can't just quit
I know how you feel. I would be furuious. 