I agree with you there, kids and ABCs are important. Full time career track licensed teachers are paid quite well here in Japan. Unfortunately that's not the kind of teacher I am.
Most foreign "english teachers" here work on yearly contracts for a fixed rate that varies very little from town to town and region to region. Not bad, but no real avenue for improvement.
From what I see of jobs in the development field, it looks very similar. Maybe that's just the way development jobs are...hired on for a project at a fixed rate then cut loose when the project is done.
Lord knows skilled developers are needed here tho...have you looked at a Japanese website recently?