Imagine the noise if our new international airport had no escalators to take you up from check-in area to the departure hall? 'Super shoddy', 'oh these cheapos', coin-your-expletives, or 'like our station' right? Switch over to the City station, and remember how you lugged your stuff up the stairs from the platform to the footbridge and back down again.
We can hear you say - there are porters to help. Why does the airport not save some money by arranging for 50-60 porters? Before this gets into socialism vs capitalism like arguments, analyze this.