Crewmeal
I imagine one reason for sky-high parking charges (and for that matter food and drink costs in cafes and restaurants) at airports is the rake-off demanded by the airport operators from the concessionaires.
Problem for EMA is that since Ryanair think that airports provide services for nothing, the revenue has to come from somewhere else - and that's the hapless punter, and those collecting and delivering punters at the airport.
It needn't be like this, but airports that have attracted carriers like Ryanair, Wizz, Easy and the like have made their collective beds, and have to sleep in it.