Recently, a friend of mine was asked for a tip in Business Class on an Air-India flight from LHR - DEL. He didn't oblige and though initially I found the idea appalling, I thought it might just make sense for some carriers like LCCs who're looking to reduce costs and improve service quality at the same time. After all, the idea behind tipping (or gratuity) is to reward good service delivery, and denounce bad quality of service. And it's already a norm in the hospitality industry.
I just wrote an article discussing the pros and cons tipping on-board a plane, but wanted to hear the thoughts of experts here, whether tipping should be allowed in an airline. Do you think it's something that will enhance in-flight service delivery and the brand experience? Or is it too "cheap" to tip someone in-flight? If it's good, how can airlines implement it easily?