I disagree with everything in this article. The assumption is that Americans should be scalped for airline tickets because, they're American and rich and deserve it. To take cheap tickets away from people in poorer countries by paying in Rupees or whatever is 'unethical'. Well, airlines are a for-profit business. They don't choose their rates out of some public-service motivation. They charge what they think they can…
Personally, I feel that if you're focused exclusively on price, you're really missing the point. I could 'save' hundreds of dollars clipping coupons, but honestly to me it's not worth it. I was at the bar the other day and some guys next to me used a ScoutMob, I didn't even know what that was. They said you could save $15 on your tab and that I was being irresponsible with my money. I shrugged and paid full price. I went to the bar prepared to spend $X, spending $X - Y doesn't really make that much of a difference in my purchasing power. What makes a difference is in how you conduct your lifestyle, what Ramit Sethi calls "big wins". Cutting ruthlessly on stuff you don't need and spending relatively extravagantly on stuff you do. Planning expenses and not just consuming things mindlessly.
I don't think it's necessarily unethical to wring every last penny from the airlines, but really, wouldn't the time and energy spent learning how to do that, implementing the strategies, and learning from your mistakes be better spent on your own business / career / life? I feel like discount shoppers wind up being like the 5 year old who'll work harder to argue with his mom why he doesn't want to clean his room than it would take to just clean it.