Mach E Avelli
It's not nice to have to do that but whilst the company should expect a descent return from their expensive training the pilot is entitled to expect to be remunerated for his hard work and loyalty. You did the right thing and they would have forgotten about it not long after you left the office.
If your prepared to work for half pay then in your mind that's all your worth and really it just makes life hard for those who can't afford to do that to win descent jobs. Ie, those with family, home loans etc.
SN