If the airplanes cannot be flown profitably at mainline rates, they do not need to be in the air.
They brag about how "efficient" these airplanes are, yet if you can't pay someone a decent wage to fly them, how efficient really is that airplane?
Efficient in undercutting wages, maybe?
That argument might have worked prior to 1978 but competition is here to stay. Modern 100-seaters can't be "outlawed" with wishful thinking. The notion that "if the airplanes can't be flown profitably at mainline rates (whatever that even is for an airplane like an EMB-190) they do not need to be in the air" may sound good but in reality that's not going to happen; somebody is going to fly them if they are a good match for the market. If the legacy carrier unions fail to come up with a solution to this issue other than simply prohibiting the planes unless they can dictate the economics a lot more jobs will be lost to competitors.
This issue is going to be one of the key issues in modern bargaining going forward. On the other hand who knows; we may find (like we did with 50 seaters) that in a strong economy with lots of customers flying that 100 seats is too small to really be efficient in many markets. I know that there were a lot of other factors and the economy and industry were different at the time but American never had much success with the F-100. So far JB and USAirways are the only US carriers to really use these planes so there's not a lot of information yet. For instance, in the case of JB, I don't know whether the economics of the 190 are so good that they offset the added costs of having a second fleet type. I would assume that this is the case or they wouldn't have bought the 190's in the first place but I don't know that for a fact. I'm sure it varies with the route, passenger demand, economy, fuel price and ticket price levels. I would like to know on what percentage of their total routes is the 190 a better profit producer than the airbus. There has to be a cutoff point.