All of this I'm convinced is relatively short term, under 30's today with new families are less reliant on travel agents and holiday companies as their parents were, also with comparison tools online becoming the norm in searching for travel options this exploitation of the traditional holiday maker is surely not sustainable.
I know few parents with kids who have booked a package holiday in the last 3 years but I know lots who have booked flights, accom and car hire separately.
The ability to come and go from different airports has been important for some as more than a few have started in one airport and have no wish to backtrack to arrival airport or even departing airport particularly in South East.
Flying into Madrid and departing from Santiago or into Rome and flying from Naples or into Nice and back from Pisa opens up lots of different opportunities that people exploiting.