EDMJ is a case in point. That €1400 will go a long way so to speak. And SAS had to carry only 1 passenger for it.
Some airlines work on this basis. Remember, it actually costs an airline to transport a passenger. By all means, keep your costs low but it's not the be all and end all in making a profit in aviation.
Also, while I see the merits of the existence of airlines like Norwegian, it ends when one airline goes for the others' jugular. Where's the competition then? The low fares for the masses? Multiple departures , etc? Trust me, it would end.
It's all about choice. You'd swear some lads get a hard-on with a carriers demise.
By the way, are the SAS nay-sayers happy with HEL captains on €44,000p.a. who can be fired if they've more than 5 sick days in the year?