This is an interesting point and may show why airport pricing for a wide range of goods is as high as it is.
There is a certain Caribbean airport we've passed through half a dozen times over the past decade.
Up until about six years ago, the concourse shops offered really sharp pricing on booze and cigarettes.
That all changed one day and prices are now more in line with those found in the states.
There are still deals to be had on a few items, particularly the inevitable local rum, but the overall potential savings are pretty well gone.
Could it be that the airport operator saw an opportunity to increase lease rates as leases came up for renewal and the retailers followed with increased prices?
We tend to blame the stores, but they operate only under the hand of the owner of the premises.