Carriers do need support infrastructure for refits etc & they are not as fast to respond as air assets but they are clearly mobile so you don't need so many fixed bases; they can provide logistic support to other units; most importantly they are a C3 platform; it can be re-roled as a Commando Carrier; they have their own self protection & some long range Int gathering equipment; it can carry personnel & equipment for combat, NEO & disaster relief (all at the same time) & yes it can be used for a pretty good cocktail party (diplomatic power). ie the point that seems to be missed continually is that the carrier isn't just an airfield, its an integrated weapons and sensor system that can do a number of roles very effectively. The aircraft it carries can also be delpoyed to a maritime environment & ashore when necessary, whilst the carrier itself could still continue to do one of a number of useful roles even when denuded of its air assets.
Cheapest? I am not a defence economist, but flexible & value for money? I'd say so.
Last edited by andyy; 14th Jun 2011 at 10:23.