In my opinion, an airport- esp a major one- should not be treated as a retail shop or an investment opportunity. In this case ofcourse, one side is clearly greedy and looking for money whatever the cost is.
An airport or a restaurant; it's all the same as long as the offer is high enough. I wouldn't be surprised if one day they sell the Pyramids for a billion or two.
If you cannot see the connection, then think about it long-term. It is critical that governments nowadays are only thinking short-term and on a personal level, worrying about the years they will be alive to see.
Global warming is one of the biggest results, in addition to all decisions taken daily that hardly benefit public affairs. It is pure selfishness, greediness, 'me first' attitude and shows no real concern for world affairs.