All I know is that teachers here are having a lean time.
This is very true. One thing that has affected it is people moving to Poland with spouses - not teachers, not training, no idea how to get people to learn, but they speak English, need a job and are fodder for the worst kind of private language school.
Here you'll find quite a few native speakers working for 40 and sometimes 30 per hr.
Exactly. In Warsaw until about 5 years ago, it started at 60zl per hour and went much higher. Unfortunately the dross who are chasing work have forced the price down.