Those LCC's are NOT cheap. I have often posted about how 1 Euro fares are higher in the end than LH 99 Euro fares. They charge for vitually everything - including using a non chip/pin credit card such as most American credit cards. And many of the airports are far away from where they claim to be - the 'Frankfurt' airport they use is actually almost in Holland and over 100km away from where it appears to be.
It is a myth and people who don't do their research in advance may be surprised to find how all the fees add up on those LCCs, including transport to/from the often remote location. Ryanair was even charging a 'wheelchair' fee for guests with mobility issues.
What surprises me is how many people moan about the bag fees on US carriers but claim that the European LCCs are so cheap. Do the research and see how many fees THEY charge.
I have to disagree with your statements on the European LCCs. I lived for several years halfway between London Stansted and London Luton airports (I moved back to North America in 2008) and, as a teacher, traveled every 6 weeks during school breaks. As long as I planned at least 6 weeks out, I never paid more than £40 per person roundtrip including all taxes and fees. Yes, Ryanair flies into some airports that are a ways out from the city centers (including both London Stansted and London Luton - neither of which are in London) but EasyJet isn't much more expensive and between the two of them, it's easy to find flights that get you where you need to go. For example, if I was flying to Berlin, Ryanair was the easy choice - £1 flights and they land at the main Berlin airport, which is easy to access by the U-Bahn transportation system. If I was flying to Paris, EasyJet would get me there for about £7, and they fly right into Charles de Gaulle airport, on the RER system.
And yes, Air Canada is making a profit right now, but let's not mention the fact that the airline had to apply for bankruptcy protection in 2003 after hemorrhaging money for many years.... despite the fact that at that point they were pretty much the ONLY option for Canadian travelers. Or the fact that the only reason that many Canadian routes are just so expensive is because of the fact that Air Canada is the only one who flies them - after Air Canada bought out it's only competition in 2001, Canadian Airlines, the common joke was "Air Canada: flap your arms if you don't like it". Or the fact that WestJet, the other Canadian airline choice, has been handily
crushing Air Canada for years, with their "no frills" model based off of SWA. They pull off the low fares very well and have been steadily expanding their destinations since they started flying in 1996. I grew up in Calgary, where WestJet's corporate headquarters are located, and while in college, EVERYONE wanted a WestJet job - they pay well, treat their employees right, and share their (constantly growing) profits with their employees.
Anyway, I do agree in theory that the constantly lowering fare model cannot survive in the face of increasing wages and fuel costs, however I do not believe that the US is the only place that demands (and receives) low cost flights, as you seem to state.