People donīt make their decision based on PRIDE, they make it based on PRICE.
If that is the case, then there would be loads of lost cost international carriers. There are always going to be people who buy a ticket based on price as well, just as there are people who fly particular airlines because of what they represent. That is why there are so many airlines around, each trying to provide each part of the market, and hopefully make some money out of it along the way.
If there was a Ģ100 difference internationally between flying with the national carrier and a non national carrier, people I think would pay the difference.
Seasoned travellers would probably not apply this, or people on a tight budget.