Can an airline be a low-cost carrier, nickel-and-diming most of its passengers, while offering luxury to a few others and charging them $15,000 for it? And is that an “all things to all people” model or a version of “divide and conquer”?

Executives at the so-called legacy carriers know that a huge part of their revenue comes from passengers who pay for business and first-class tickets, so they are trying to keep them happy by installing flat beds, upgrading entertainment systems and serving gourmet meals. However, airline chiefs also realize that most people on their planes sit in coach and can’t afford $7,000 to fly to Europe in business class. Because economy passengers pay what the airlines consider low fares, carriers are trying to minimize the costs associated with carrying those fliers…