Walmart changing some stores

Maybe Walmart should have a policy if you spend so much money with them, then you can stay for 8 hours at no additional charge. After all they had to pay to put in the parking area,light it,pick up litter etc.But for people who say campgrounds are too expensive, there is a book " Free or Inexpensive" Campgrounds. Plus if you're 62 or older,you can get the Senior Pass and pay half price at any Federal Campground.We usually stay at a campground over nite,but have on rare occassions for a few hours. But it's either a rest area or a Flyin J where we get gas and something to eat which helps them pay for the "free" parking.