In the article I read was this quote:
“Gone are the days of using trolleys, carparks and bags for free. Ticket prices don’t cover the costs of maintenance or running of the airport anymore. People don’t realise that as air travel costs decline, it means that the costs have to be covered elsewhere.”
That is the simple truth and pax mustn't forget that '£70 rtn to AMS' is not realistic. Airports are not cheap to run and must get the money back from parking, the fees paid by the food hall shops and so on.