"The fact is, teaching is an incredibly easy job."

I'd just like to point out that this statement isn't actually related to the others you made. In Western Australia it's been popular for a while due to the mining boom to go and get a fly in/fly out job in one of the mining towns. The pay is fantastic and the time off is good. This does not correlate to being "an easy job".

I could say that it is "easy to do a bad job", but when is that not the case?

Anyhow, just wanted to point that out. Not after an argument :)