Who benefits from impounded goods at airports?

A passenger who was in transit to Gaborone from London via Dubai in the United Arab Emirates was incensed at having to "forfeit" the precious gifts she had bought from a duty free shop at London's Heathrow International Airport.

"Somebody had better look into this matter because it is degenerating into daylight robbery. If the responsible people know that these things are not allowed in the aircraft, why should they allow duty-free shops to sell them?