When you think that an automobile requires at least 5 parking spaces (or at least there normally are about 5 times the parking spaces as there are cars), the issue of land use and land waste is the first order of business when you think about parking.
But what would be fair prices for parking? If I drive to a mall and park outside, I'd expect the price of the goods I might buy to contain a small parking fee. Of course, if I arrive by bus and buy a bunch of stuff, I'm still paying for parking. I don't see any mall owner being particularly interested in charging for parking spaces either... it would be almost too much trouble.