I've worked retail jobs where employees were assigned lot duty on a rotating basis, and I can assure you most people didn't want to do it and staff had to be vigilant to make sure it wasn't being neglected. It's moderately hard physical labor (assuming there are no powered cart-pusher things and the lot is large and on some kind of slope), and is out in the elements where it can be frigidly cold and windy or swelteringly hot. Some employees might be misanthropic enough in context that they'd rather do it than work inside, but it's definitely not all or even a majority in my experience.