Andy your textbook explanation doesn't explain why after at least 6 FARE increases this year load factors are in the 80 percent range. The textbook answer to that would be that the demand is much less elastic than it has been in the past. If the demand is relatively inelastic a price increase will have little effect on demand.
Specifically, airfares were raised on which routes? Elasticity of demand is not uniform across all city pairs. If you really want to get into the weeds of elasticity of air travel, read this: http://www.iata.org/SiteCollectionDocuments/air_travel_demand_summary.pdf
However, the topic that you were discussing was pilot salaries. I was using the supply-demand curve example with respect to pilot supply, demand, and salaries.
Simply put, if there are less pilots than demand for pilots, salaries will increase. If there is a surplus of pilots with respect to demand for pilots, salaries will decrease.
In the real world, changing pilot retirement age to 65 has resulted in a surplus of pilots and keeps wages depressed. Similarly, pilot contracts which increase pilot productivity have the same negative effect on wages.
Raising the minimum pilot requirement from commercial license to ATP to fly part 121 will result in a smaller pilot pool and will result in higher wages.