Let me challenge you on some points you have made:

If anything FT's working on F and L Visas should get a higher wage because in my experience, generally speaking, they seem to be better teachers.

What?! Seems a bit too one-sided. How would you define a "better teacher"?

When we are talking about oral English? Somebody born into the job, Turnoi.

Yes I have a degree, earned as a second consideration to drinking, fornicating, and doing as little studying as possible- and while doing a demanding job.

As for Africa..they hand degrees out ten a penny, don't they, not surprised you only had one failed student?