What makes you think most of those have no career path? The number one, Retail Salespersons, have the obvious path into becoming sales managers for the local office, then the region etc. Even fast food workers can become the store manager.

And those jobs often have less competition for those management positions because they're so often held by college students who go on to jobs in the industry they've studied rather than competing with other salespersons or fast food workers for the office manager position.