Whoever said it is right.
Most pilots don't have degrees, and only about one in 50 teachers will ever head the team as the Principal whereas better than one in two will head the team as the Captain.
Is a principal worth more or less? I don't know, and surely there can't be a comparison the fields are so different.
Bear in mind that the guy in charge will do everything to devalue your job so he can justify paying you less. That's what you have to combat, not the comparisons.
BA Lert you're right. The times are a changin, and not just for us, but everybody. The industrial reforms that swept the world over the past 10-15 years are just starting to bite here. Good luck.
Howard I agree with you.