Organizational Success Increases (OSIs) boosted salaries by 1% and the pay hikes from Superior Contribution Increases (SCIs) ranged from 0.6% to 1.8%.

WSJ: Review & Outlook: FAA Bonuses and the Sequester

But SCIS praises changes in training in recent years, such as a guaranteed year's work for probationers to allow them to hone their skills.

BBC: Teacher training comes under fire

According to the SCIS, training standards may be one reason teachers do not seem to command the same respect as professionals in other fields.

BBC: Teacher training comes under fire

The SCIS suggests lecturers at training colleges can be "far removed from the 21st century and out of touch with the current generation of pupils".

BBC: Teacher training comes under fire

According to the SCIS report, there is a lack of confidence that newly-trained staff will know their subjects well and be competent in practical classroom skills.

BBC: Teacher training comes under fire