The places we currently build are by no means the product of a free market. Automobile-based transportation is heavily subsidized both through direct taxation paying for automobile-optimized roads as well as minimum parking requirements that essentially proscribe building anything resembling a walkable neighborhood in many cities. And those requirements mean that anyone who doesn't drive to a business is forced to share in the cost of providing parking for a business (which can be tens of thousands of dollars a parking space). It's also quite rare for a business to ask employees to pay for parking or to give any money back to employees that don't use free parking.