I think it's a little arrogant to expect ID fares from Low Cost carriers considering how cheap they can be. I would, however, like to encourage LCs to offer their minimum booked fares (the realistic ones I'm talking about) to staff and ATC without the usual applicable restrictions. As far as the full service carriers are concerned even ID90 isn't the saving it used to be. ID80 depends on the fare basis and ID75 is nothing less than an insult as this will generally cost more than a fully booked internet fare. On a particular sector which I often fly I pay 6 euros less for an ID90 than I do for the cheapest advance purchase fare. The only advantage of the ID90 is the flexibility to change my travel dates.