For 70 years, duty free sat at the intersection of monopoly on concessions, opaque pricing, cross-border tax rules, very captive audiences, and political insulation. Non-aeronautical revenue — retail, food, alcohol, duty free — accounts for roughly 40–60% of total airport revenue at major hubs.

Duty-free shopping existed for a pretty straightforward economic reason: it helps countries capture spending from international travelers. When a traveler leaves a country, the products they buy in the airport are technically exports. Because those goods are leaving the country and won’t be consumed locally, governments allow retailers to remove local taxes like VAT or GST.

But does it still work? And why? Surely you're not saving that much in a system that's only gotten more rigged through the decades. Or ARE you.......